How to Build a Sign Project Specification Sheet for Quoting, Production, and Installation

A sign project can look surprisingly simple at the beginning. Someone sends a logo, adds a storefront photo, gives an approximate width, and asks for a price. The trouble usually starts later. The wall turns out to be glass instead of masonry. The approved color was buried in an email. The electrical contractor expected a different wire exit. The mounting holes were never confirmed. One drawing says 1200 mm wide while a later message says 1350 mm. None of these problems are unusual; they are symptoms of a project that never had one clear technical reference.

A sign project specification sheet should bring the project identity, sign type, quantity, dimensions, materials, colors, illumination, electrical system, mounting conditions, site requirements, approved drawings, QC standards, packaging, delivery information, and revision status into one controlled document. It should be detailed enough for quotation, engineering review, production, inspection, installation, and future reorders.

That is why the best specification sheet is not simply a form to complete before requesting a quote. Think of it as the project’s memory. Six months after approval, someone who was never part of the original email chain should be able to open the sheet and understand what needs to be made, how it should perform, where it will be installed, and which version is actually approved.

What Should a Sign Specification Sheet Include?

A sign specification sheet should record the project identity, sign code, quantity, location, approved files, dimensions, materials, colors, illumination, electrical requirements, mounting conditions, site information, QC standards, packaging, delivery requirements, revision number, and approval status. The goal is to give quotation, engineering, production, inspection, and installation teams one reliable source instead of relying on scattered emails, drawings, and messages.

What Project Information Should Be Recorded?

Start with the information that identifies the job. A logo file and sign size are not enough. The specification sheet should make it clear which site, store, drawing, deadline, and destination market the sign belongs to.

For most commercial projects, record at least:

• Project name
• Internal project number
• Store or site number
• Installation address
• Destination country
• Sign code
• Sign type
• Quantity
• Required delivery date
• Expected installation date
• Person responsible for final approval

For chain-store work, store codes should appear consistently on drawings, production records, packing lists, cartons, and installation documents. A project involving 30 stores becomes difficult to control if every file is simply named “storefront logo.”

Location also affects engineering. A 2,400 mm channel letter set installed on indoor drywall is not the same project as the same logo installed on outdoor brick. The appearance may be similar, but wall construction, mounting hardware, electrical routing, weather protection, and installation access can all change.

Destination country also matters. Voltage, plug requirements, power supply configuration, component certification, packaging, freight method, and installation practice may differ from one market to another.

For illuminated channel letters, Iduoduo’s quotation records can include as many as 20 project inputs: logo or font files, overall size, letter height, quantity, illumination method, face color, return color, depth, indoor or outdoor use, LED color or color temperature, voltage, power certification, mounting method, raceway or backboard, wire exit, wall type, waterproof requirement, destination country, packaging, and project date.

A practical project-information block may look like this:

Field	Example
Project	Phoenix Retail Store 018
Sign Code	EX-CL-01
Product	Front-Lit Channel Letters
Location	Main Storefront
Quantity	1 Set
Destination	Arizona, USA
Installation Surface	Brick Wall
Required Delivery	October 20
Final Approver	Brand Project Manager

The more clearly the project is identified at the beginning, the less chance there is of mixing drawings, hardware, cartons, or revisions later.

How Should Each Sign and Quantity Be Identified?

Every sign should have a unique sign code. Avoid names such as “big logo,” “front sign,” “second sign,” or “lobby letters.” Those names work in a short email thread but become unreliable once the project reaches engineering, production, QC, packing, and installation.

A simple code system is usually enough:

• EX-01 — Exterior Main Sign
• EX-02 — Exterior Blade Sign
• ID-01 — Reception Logo
• ID-02 — Directional Sign
• S018-CL-01 — Store 018 Channel Letters
• S018-LB-01 — Store 018 Light Box

The same code should appear on the specification sheet, shop drawing, QC checklist, accessory bag, carton label, packing list, and installation drawing.

Quantity should also be linked to location and size rather than listed only as a total.

For example, “20 sets of channel letters” may actually mean:

Store	Sign Code	Width	Wall Type	Qty
S001	CL-01	2,400 mm	Brick	1
S002	CL-01	2,700 mm	ACM	1
S003	CL-01	2,200 mm	Concrete	1
S004	CL-01	3,000 mm	Metal Frame	1

All four signs may use the same logo, but they are not necessarily identical products. Different widths can change letter height, stroke width, LED quantity, power load, mounting-hole position, backboard size, carton dimensions, and freight volume.

For larger rollouts, it is useful to add:

• Store number
• Sign code
• Size
• Quantity
• Voltage
• Wall type
• Mounting method
• Package number
• Delivery address

Iduoduo’s packaging and delivery records can use product numbers, store numbers, carton numbers, packing lists, and shipment records to keep multi-SKU and multi-location projects separated.

A clear identification system makes replacement orders easier as well. Instead of writing “we need another front logo from last year,” the request can reference “S018-CL-01, Rev B,” which greatly reduces the chance of reproducing the wrong version.

Which Approved Files Should Be Referenced?

The specification sheet should reference the exact files used to manufacture the sign. “Use latest drawing” is risky because different people may have different ideas about which file is latest.

Record the file name, drawing number, revision, issue date, and approval status.

A controlled file list might look like this:

File Type	Reference	Status
Logo Artwork	Retail-Logo-Rev03.ai	Approved
Storefront Elevation	A401-RevC.pdf	Approved
Shop Drawing	SD-CL-018-RevB.pdf	Approved for Production
Mounting Pattern	MP-018-RevA.pdf	Approved
Color Sample	CS-P186-02	Approved
Packing Layout	PK-S018-RevA.pdf	Approved

Different files control different parts of production.

The artwork controls shape, font, spelling, and proportions. The shop drawing controls dimensions and construction. The color schedule controls paint or material appearance. The electrical specification controls voltage, power, and wiring. The mounting drawing controls holes, studs, brackets, or raceway positions.

A strong project record may include:

• Final artwork
• Approved shop drawing
• BOM
• Color schedule
• Finish schedule
• Electrical specification
• Mounting specification
• Approved sample
• QC checklist
• Packaging specification
• Product code
• Store code

These are also among the documents used in Iduoduo’s quality-control system.

Avoid sending production teams several similar PDFs with names such as:

“final.pdf”
“final-new.pdf”
“final-new-2.pdf”
“really-final.pdf”

A drawing number and revision system is much safer.

For example:

SD-018 Rev A
SD-018 Rev B
SD-018 Rev C
SD-018 Rev C — Approved for Production

Only one version should control production.

How Should the Sign Specifications Be Listed?

The physical sign needs to be defined in measurable terms. Product names alone do not provide enough information for accurate manufacturing.

“Channel letters” does not explain their depth, face, return material, color, LED configuration, mounting, or electrical system. “Gold metal letters” does not define the metal grade, thickness, surface finish, mounting, or exact color appearance.

A practical specification should cover the fields that actually change construction or cost.

Category	Typical Information
Dimensions	Width, height, depth, letter height, projection
Material	Aluminum, stainless steel, acrylic, PVC, foam
Thickness	Sheet, face, back, panel, letter thickness
Color	Pantone, RAL, paint code, vinyl code
Finish	Painted, brushed, mirror, powder coated
Lighting	Front-lit, halo-lit, side-lit, non-illuminated
LED	Color, color temperature, RGB, RGBW
Electrical	Voltage, power supply, controller
Mounting	Studs, screws, brackets, raceway, backboard
Wire Exit	Rear, center, bottom, side, specified coordinates
Environment	Indoor, outdoor, coastal, sheltered
Packing	Carton, foam, crate, store grouping

Dimensions deserve particular attention. For channel letters, an overall logo width may not be enough. Depending on the project, the sheet may also need individual letter height, return depth, stroke width, spacing, backboard dimensions, raceway size, and stand-off distance.

Materials should also be specific enough to guide purchasing and QC. Iduoduo’s material engineering records can include BOMs, material schedules, color schedules, finish schedules, approved samples, supplier records, material batches, replacement records, QC checklists, and packaging requirements.

Color requires the same discipline. “Red” can produce many different results. A stronger specification would state “Pantone 186 C” or reference an approved physical sample.

The same applies to metal finishes. “Gold” may mean painted gold, brushed gold stainless steel, mirror gold stainless steel, or another surface treatment. The finish should be written clearly enough for purchasing, production, and inspection teams to compare the finished sign with the approved standard.

How Should Approval and Revision Status Be Controlled?

The specification sheet should show what has been requested, what has been approved, and which version is allowed to enter production.

A simple status system works well:

Requested
Under Review
Revised
Approved
Approved for Production

Production should not begin while important fields remain unresolved.

Before release, the project should normally confirm:

• Logo
• Dimensions
• Quantity
• Materials
• Colors
• Surface finishes
• Illumination
• LED color or color temperature
• Voltage
• Power supply
• Wire exits
• Mounting
• Raceway or backboard
• Packaging
• Delivery schedule

Iduoduo’s production-freeze process follows the same principle. Logo, size, material, color, lighting, power, mounting, quantity, packaging, and project timing should be approved before one production version becomes active. Older versions should no longer remain in use on the production floor.

Revision records should show more than a revision letter. They should record what changed and what the change affects.

Revision	Change	Possible Impact
Rev A → B	Width 2,400 → 2,800 mm	Material, LEDs, power, packing
Rev B → C	Raceway removed	Wiring, holes, installation
Rev C → D	Indoor → outdoor	Materials, sealing, drainage
Rev D → E	Quantity 10 → 35	Production schedule, packing
Rev E → F	Wire exit moved	Installation and drilling

Iduoduo’s revision-control records can include the modification, date, person making the change, project feedback, and whether the change affects price, lead time, materials already purchased, or packaging.

A size change that looks small on a drawing can create several downstream changes. Increasing a channel letter from 600 mm to 900 mm may affect metal consumption, return depth, LED layout, power capacity, mounting hardware, carton size, freight volume, and installation handling.

The specification sheet should therefore become the single approved reference connecting quotation, drawing approval, production, QC, packing, and installation. If two departments are working from different versions, the project is not fully controlled.

How Do You Specify the Sign Itself?

Specify the physical sign in measurable terms: overall dimensions, individual letter or panel dimensions where necessary, depth, materials, material thicknesses, colors, finishes, construction method, illumination type, environment, and relevant tolerances. Avoid descriptions such as “large,” “premium metal,” or “gold finish” unless a measurable specification or approved sample sits behind them.

Which Dimensions Should Be Defined?

The specification should contain enough dimensions for the factory to manufacture the sign without measuring proportions from a rendering. Overall width and height are only the starting point. Depending on the sign type, depth, letter height, stroke width, spacing, panel thickness, projection, stand-off distance, backboard size, raceway size, bracket position, and segmented dimensions may also need to be recorded.

For channel letters, Iduoduo’s shop drawing records can include the front view, overall dimensions, letter height, total width, return depth, section details, face, return, back, LEDs, power supplies, mounting holes, wire exits, colors, quantity, and mounting method. Complex projects may also require segmentation, raceway details, and electrical grouping.

A practical dimension schedule can look like this:

Dimension	Example	Why It Matters
Overall Width	2,800 mm	Controls scale, material use and packing
Overall Height	720 mm	Confirms storefront fit
Letter Height	650 mm	Helps check visibility and proportions
Return Depth	100 mm	Affects structure, LEDs and appearance
Minimum Stroke	55 mm	Determines fabrication and LED space
Letter Spacing	40–85 mm	Controls logo proportion and installation
Stand-Off	30 mm	Important for halo lighting
Backboard	3,000 × 850 mm	Controls mounting and shipping size

Dimensions should always be connected to a drawing revision. Writing “approximately 2.8 m” may be acceptable during early budgeting, but not for production.

Large signs also need transport considered before the size is frozen. A sign that fits the façade as one piece may not fit the crate, freight route, elevator, doorway, lifting equipment, or installation access. When segmentation is required, the drawing should show where sections divide and how they reconnect.

For repeat orders, do not rely only on the old overall size. Preserve letter height, depth, mounting holes, wire exits, templates, and other production dimensions. Iduoduo records these items for channel letter repeat production because a sign can look nearly identical while being incompatible with an existing mounting pattern.

How Should Materials Be Specified?

Write material specifications at a level that affects purchasing, manufacturing, appearance, or service life. “Metal,” “plastic,” and “acrylic” are too broad for a production sheet.

A metal specification may need the material type, grade where required, thickness, surface treatment, and visible finish. Acrylic may require thickness, color, opacity, light transmission role, or whether it forms the face, back, edge, or complete letter body. PVC, foam, composite panels, adhesives, sealants, fasteners, raceways, and backboards should be defined when they influence structure or installation.

A useful material schedule might include:

Component	Specification Example
Letter Face	3 mm white acrylic
Return	1.2 mm aluminum
Back	3 mm PVC or project-approved back panel
Backboard	Aluminum composite panel
Studs	Stainless steel
Sealant	Outdoor-grade, project-approved
Surface	Painted finish
Raceway	Aluminum, matching approved façade color

The correct material cannot be selected from appearance alone. Iduoduo’s material engineering considers logo geometry, size, illuminated or non-illuminated construction, indoor or outdoor exposure, wall condition, mounting method, climate, shipping, maintenance, and repeat-order requirements. Material records can cover metal grade and thickness, acrylic and plastic type, foam density, composite panels, adhesives, sealants, fasteners, backboards, raceways, finishes, batch records, and approved substitution rules.

Substitution rules deserve particular attention. If an exact acrylic, LED component, paint system, or metal finish becomes unavailable, the production team should know whether an alternative can be used or whether approval is required first.

For larger rollouts, retain the BOM and approved sample information. Iduoduo uses BOM records covering faces, returns, backs, LEDs, power supplies, wiring, connectors, surface treatments, studs, raceways, packaging, and accessories to support transfer from sample to volume production and later repeat orders.

How Do You Define Colors and Finishes?

Avoid specifications such as “brand red,” “matte black,” “silver,” or “gold” without a controlled reference. Those terms can produce noticeably different results across paint, acrylic, stainless steel, vinyl, printing, and lighting.

Where possible, identify color using Pantone, RAL, paint code, vinyl code, CMYK, RGB, approved material sample, or an approved physical color chip. Then state exactly where the color applies.

For example:

Area	Color / Finish
Acrylic Face	White
Aluminum Return	Pantone 186 C
Letter Back	Black
Raceway	RAL 9005 Matte
Visible Studs	Black
Backboard	Match wall sample
Vinyl Graphic	Approved vinyl code

Surface finish should be recorded separately from color. Stainless steel can be brushed, mirror polished, painted, electroplated, or finished in other ways. Two pieces of “gold stainless steel” can look very different if one is mirror finished and the other brushed.

For high-visibility brand projects, a physical sample is often more useful than approving color from a monitor. Screen brightness, surrounding lighting, acrylic transmission, metallic reflection, and paint texture can change how a color appears.

Iduoduo’s material control can use color schedules, finish schedules, sample approval records, material batches, and replacement records so production and QC are checking against the same approved reference.

Lighting and daytime color should also be separated. A white acrylic face may appear one way when unlit and another when illuminated at 3000K, 4000K, or 6500K. For illuminated branding, both daytime appearance and nighttime appearance should be approved when color consistency matters.

Which Construction Details Matter?

The product name should never be treated as the complete construction specification. “Front-lit channel letters,” “light box,” “LED neon,” or “acrylic logo” still leaves many production decisions unresolved.

For channel letters, relevant construction details may include:

• Face construction
• Return material and depth
• Back material
• Trimmed or trimless edge
• LED arrangement
• Power grouping
• Drainage
• Wire exit
• Mounting holes
• Raceway or backboard
• Service access
• Segmentation for large signs

Iduoduo defines channel letters as a system combining logo and font engineering, metal returns, face and back construction, LEDs, power, wiring, weather protection, drainage, mounting preparation, testing, and packaging—not simply a three-dimensional logo with LEDs inside.

Light boxes require a different set of construction decisions: cabinet frame, face or graphic system, internal depth, LED layout, service method, drainage, bracket structure, power location, and installation interface. Iduoduo’s light box, blade sign, and cabinet sign engineering includes frame structure, face and graphics, LED optics, power and wiring, service access, weather protection, drainage, brackets, mounting preparation, testing, and repeat-order file control.

Construction should also be checked against maintenance. A completely sealed appearance may look clean but create problems if a power supply or LED section later needs service. Where maintenance matters, record how the face, back, panel, or electrical compartment can be accessed.

For a sample or first article, inspect more than appearance. Iduoduo’s first-article confirmation can include dimensions, materials, structure, return depth, surface, face, light color, brightness, power, wiring, mounting holes, wire exit, and packaging before the production file is frozen.

Is the Sign for Indoor or Outdoor Use?

Always state indoor or outdoor use, but do not stop there. The real environment should be recorded because two outdoor locations can place very different demands on the same sign.

A useful environmental section may include:

Condition	Example
Installation	Outdoor storefront
Exposure	Direct rain
Sun	Full afternoon sun
Climate	Hot and dry
Wall	Brick
Mounting Height	5.5 m
Access	Scissor lift
Power Location	Behind wall
Maintenance	Front access not available
Destination	Arizona, USA

An indoor reception sign may focus on close-range appearance, concealed wiring, wall protection, quiet electrical operation, and clean mounting. An outdoor storefront sign may require corrosion resistance, sealing, drainage, cable protection, weather-resistant materials, and more careful mounting preparation.

Coastal, high-humidity, high-temperature, freezing, dusty, exposed-rooftop, and sheltered-canopy locations should not be grouped together under one generic “outdoor” specification.

Iduoduo’s project engineering uses viewing distance, installation surface, indoor or outdoor exposure, daytime and nighttime appearance, lighting level, electrical conditions, maintenance access, shipping method, and repeat-production requirements when deciding how a sign should be built.

For illuminated signs, environmental conditions can affect more than the enclosure. Power supplies, cable entries, connectors, drainage paths, mounting holes, wall penetrations, and service access all need coordination.

The specification should also avoid assuming that factory waterproof construction alone determines the final installed performance. A properly prepared sign can still experience water problems if cable penetrations, wall interfaces, connectors, or local installation work are poorly sealed.

For repeat orders, reconfirm the destination country, voltage, quantity, and installation environment even when the logo and basic construction remain unchanged. Iduoduo specifically keeps these checks in its repeat-order process because a previously approved sign may need different electrical, mounting, or environmental treatment at a new site.

How Do You Specify Lighting and Power?

For an illuminated sign, specify the lighting method, LED color or color temperature, control type, operating voltage, power supply arrangement, wire exits, cable routing, and destination-market electrical requirements. “LED illuminated” is not a complete specification. Lighting and power details should be clear enough for engineering, quotation, production, testing, and installation teams to work from the same approved electrical setup.

Which Illumination Method Is Required?

Start by defining where the light should appear, rather than writing only “LED sign.”

Different illumination methods require different faces, backs, letter depths, LED layouts, wiring, stand-off distances, and installation details. The lighting method therefore needs to be fixed before the final structure and electrical layout are approved.

Typical entries may include:

Lighting Method	What the Specification Should Clarify
Front-Lit	Illuminated face, face material, LED color
Halo-Lit	Rear illumination, stand-off distance, wall background
Front + Halo-Lit	Front and rear light requirements separately
Side-Lit	Which edges or returns transmit light
Light Box	Face type, cabinet depth, internal lighting
LED Neon	Neon Flex color, line path, backing and control
Non-Illuminated	No LED, power supply or electrical system

For halo-lit letters, the wall becomes part of the visual result. Stand-off distance, wall color, wall texture, letter depth, LED arrangement, and spacing between letters can change how the halo looks after installation. Closely spaced letters can produce overlapping halos even when each individual letter looks correct.

Front-lit channel letters have a different problem. Light must spread across the face without obvious bright spots or dark areas. Iduoduo’s engineering records identify letter depth, LED spacing, LED-to-face distance, face transmission, internal reflection, stroke width, corners, voltage, circuit grouping, and product size as factors affecting illumination uniformity.

For RGB or RGBW projects, lighting mode also affects the electrical system. The sheet should state whether the sign needs:

• Static color only
• Dimming
• Remote control
• App control
• RGB color changing
• RGBW color changing plus independent white light
• Multiple lighting zones
• Project-specific control

Iduoduo supports warm white, neutral white, cool white, single-color LEDs, RGB, RGBW, dimming, remote control, app control, zoning, and project-specific control systems.

The selected lighting method should appear consistently on the specification sheet, rendering, shop drawing, electrical drawing, sample approval, and QC checklist.

How Should LED Color Be Defined?

Do not write only “white LED.”

White light should be identified by the approved color temperature or by a confirmed sample. Warm white, neutral white, and cool white can create noticeably different results even when the sign uses the same acrylic face and letter construction.

Iduoduo’s project records separate common light options into warm white, neutral white, cool white, red, blue, green, pink, yellow, RGB, RGBW, and other approved single-color configurations.

A lighting specification can record:

Field	Example of What to Confirm
Lighting Type	Front-Lit
LED Color	White
Color Temperature	Approved CCT
Face Color	White Acrylic
Daytime Appearance	White Face
Night Appearance	Approved White Light
Control	On/Off
Dimming	Required / Not Required
RGB/RGBW	Required / Not Required
Approval Reference	Sample / Photo / Lighting Video

Daytime color and illuminated color should be treated separately.

For example, a white acrylic channel-letter face normally remains visually white when the sign is switched off. The nighttime appearance comes from the LED system behind the face. An approved red paint on the return does not automatically define the illuminated face color.

Brand-color projects need even more care. A Pantone value used for paint is not automatically reproduced by an LED. Pantone, CMYK, RGB, paint, translucent acrylic, vinyl, and emitted LED light use different color systems and materials. Iduoduo’s project guidance specifically notes that Pantone, CMYK, and RGB cannot be treated as directly interchangeable values.

RGB also has practical limits. RGB mixes red, green, and blue channels to create different colors, but the final appearance can change with LED chips, controller settings, diffuser material, brightness, face color, ambient light, and even the camera used to photograph the sign. RGB lighting therefore should not be specified as “match Pantone exactly.”

RGBW adds a separate white channel. It is useful when one sign needs both colorful effects and a more stable dedicated white-light mode. Iduoduo’s records note that RGBW systems require compatible LEDs, controller, wiring, power supply, and connectors.

For chain stores, record the approved LED model, LED color, color temperature, module spacing, letter depth, face material, controller, test photographs, lighting video, and approved sample whenever consistency between batches matters.

What Voltage and Power Are Required?

The electrical specification should begin with the power available at the installation site, not with whichever power supply happens to be convenient for the factory.

Record the destination country and site electrical requirements before approving the power configuration. Iduoduo treats voltage, power requirements, destination country, installation conditions, and power certification requirements as separate project inputs rather than assuming one electrical setup for every order.

A useful electrical schedule can contain:

Electrical Field	Information to Confirm
Destination Country	Final installation market
Site Input	Confirmed building AC supply
LED System	Approved operating configuration
Power Supply	Model/specification approved for project
Power Quantity	Based on sign load and circuit grouping
Power Position	Inside sign / raceway / behind wall / remote
Controller	None / dimmer / RGB / RGBW
Cable Requirement	Type and required length
Plug	Required / hardwired
Access	How power supplies can be serviced

Power-supply location should be decided early.

A power supply placed inside a raceway creates a different service arrangement from a remote power supply placed behind a wall. A driver hidden in an inaccessible ceiling or sealed wall cavity may make later maintenance unnecessarily difficult. Where the local electrician will complete the mains connection, the boundary between factory-supplied low-voltage components and site electrical work should be visible on the drawing.

Power grouping also matters on larger signs. A long logo or large set of letters may need more than one power circuit. Poor grouping can contribute to uneven performance, long cable runs, voltage drop, difficult troubleshooting, or power supplies operating under unsuitable loads.

The electrical system should therefore be treated as more than a power adapter. Iduoduo’s electrical engineering records identify building AC input, switching or distribution, power supplies, low-voltage output, LEDs, controllers, dimmers, circuit grouping, connectors, wiring, plugs, grounding, waterproofing, labeling, service access, and the installation interface as parts of the complete electrical system.

Errors in those areas can lead to failure to illuminate, low brightness, dim sections, flicker, controller problems, overheated wiring, incompatible site voltage, unusable plugs, or local acceptance problems.

Where Should Wires Exit?

Wire exits should be dimensioned before production whenever the site already has electrical rough-ins or concealed wiring requirements.

“Wire from back” is often not specific enough.

For individually mounted channel letters, each letter may need a rear cable exit coordinated with the installation template. For a backboard or raceway, cables may need to leave from one defined location. Glass walls, stone façades, metal cladding, finished millwork, and existing storefront panels often provide very little freedom to move a cable after the sign arrives.

The specification can record:

• Wire-exit side: rear, top, bottom, left or right
• Exit position relative to sign edges
• Number of cable exits
• Cable length required
• Whether individual letters have separate exits
• Whether wiring routes through a raceway or backboard
• Whether the site already has electrical rough-ins
• Whether visible wiring is acceptable
• Whether connectors must remain accessible
• Whether the exit requires weather sealing

For example, instead of:

“Wire exit: rear”

write:

“Rear wire exit per mounting drawing MP-018 Rev B; position must align with existing wall penetration.”

Wire exits and mounting holes should be reviewed together. Moving a cable outlet after the mounting template has been approved can affect drilling, stud placement, wall penetration, raceway layout, or the electrician’s rough-in.

Iduoduo specifically includes wire-exit position among the core quotation and repeat-production records for channel letters. Final drawings, LEDs, power supplies, mounting holes, wire exits, templates, packaging, and QC records can be retained for repeat projects.

For outdoor installations, the cable route also becomes part of weather protection. The sign enclosure can be properly prepared at the factory while a poorly positioned or poorly sealed site penetration still creates water-entry risk.

The specification should therefore show both sides of the interface: where the factory wiring ends and where the local installation begins.

Which Electrical Requirements Apply?

The electrical section should define the complete operating arrangement rather than relying on a note such as “standard power.”

A practical checklist can include:

• Destination country
• Site input voltage
• LED operating system
• Power supply model or required specification
• Number of power supplies
• Power supply location
• Circuit grouping
• Controller type
• Dimmer requirement
• Plug type, if applicable
• Cable length
• Connector type
• Wire-exit position
• Grounding requirement where applicable
• Indoor or outdoor electrical location
• Waterproof connector requirement
• Component certification requirements
• Service access
• Local electrician responsibility
• Labeling requirements

Certification wording should be handled carefully. A certified power supply or another certified component does not automatically prove that every completed sign and installation meets every rule in every destination market. The project specification should state which certification is required, what component or finished product it applies to, and whether local approval must still be confirmed.

Control systems need the same level of detail.

For a dimmable sign, define how dimming is operated. For remote control, confirm the remote, receiver, pairing, operating range, battery, packaging, and backup method. For RGB or RGBW, specify the controller, channels, wiring, power supply, connectors, and required operating modes. Iduoduo’s records specifically identify remote control, app control, zoning, dimming, RGB, and RGBW as separate control configurations rather than one generic “color-changing” option.

Electrical approval should finish with a test requirement.

For illuminated signs, Iduoduo performs a 100% lighting inspection followed by a 72-hour pre-shipment test. The test checks LED stability, power-supply stability, controller operation, flicker, early failures, color differences, local dark areas, abnormal heat, and wiring connections. Problems found during testing are repaired or replaced and then verified again.

A useful final electrical check can therefore be tied directly to the specification:

QC Item	What Should Match
Lighting Method	Approved drawing
LED Color / CCT	Approved sample or specification
Voltage	Project electrical specification
Power Supplies	Approved model and quantity
Controller	Required function and programming
Wire Exits	Approved shop drawing
Cable / Connectors	Approved electrical setup
Lighting Uniformity	No unacceptable dark areas or hot spots
Functional Test	Controls, dimming, RGB/RGBW as specified
Pre-Shipment Test	Completed before release

When lighting and electrical requirements are written at this level, quotation, manufacturing, installation, QC, and later troubleshooting all work from the same electrical baseline rather than trying to reconstruct the setup after the sign reaches the site.

How Do You Specify Mounting and Site Conditions?

Define the installation surface, sign position, mounting method, hole or stud layout, wire exits, raceway or backboard, access conditions, and outdoor exposure before production. Mounting specifications should show how the factory-made sign connects to the real building. Site measurements, wall construction, electrical rough-ins, maintenance access, and local installation responsibilities should be confirmed before the production drawing is released.

What Is the Mounting Surface?

“Wall mounted” is not a sufficient installation specification. The drawing should identify the visible surface and, where known, the structure behind it.

A sign fixed to concrete behaves differently from one installed on drywall, glass, ACM cladding, stone, timber, or a curtain-wall system. The surface influences mounting hardware, stud length, bracket design, drilling, cable routing, backboard requirements, product weight, and how much work is required on site.

A practical site record can include:

Site Field	Example
Installation Surface	Brick façade
Structure Behind	Masonry
Wall Thickness	Confirmed by local contractor
Sign Height	5.2 m above grade
Available Sign Area	4,200 × 1,100 mm
Existing Holes	None
Power Rough-In	Behind center of sign
Access	Scissor lift required
Wall Condition	Finished / no visible conduit
Installer	Local sign contractor

Several common wall types require very different preparation:

• Concrete or masonry: usually requires drilled anchors or studs matched to the structure.
• Brick: fixing position needs care around joints, cavities, and wall condition.
• Drywall: the finished face alone may not provide enough support; framing or backing location matters.
• ACM or metal cladding: the visible panel may not be the structural fixing point.
• Glass: drilling may be prohibited or tightly controlled, making backboards, suspended systems, or alternative mounting necessary.
• Stone or tile: hole position and drilling method should be coordinated before the product arrives.
• Timber: fastener position should match suitable structural material rather than decorative panels alone.

Product weight also needs to be considered alongside the wall. Iduoduo’s material records note that fastener selection can depend on product weight, wall construction, outdoor exposure, corrosion, mounting height, maintenance requirements, and local rules.

A storefront photograph is useful, but photographs cannot reliably show wall thickness, framing, cavities, hidden services, or structural capacity. For larger or elevated signs, the local installer or project engineer should confirm the actual supporting structure.

The division of responsibility should remain clear. Iduoduo can prepare shop drawings, mounting layouts, templates, studs, holes, brackets, raceways, backboards, wire exits, power components, and accessory kits. Local project teams remain responsible for site measurements, wall conditions, anchorage, structural calculations, wind loads, building waterproofing, final electrical connection, permits, and final acceptance.

Which Mounting Method Should Be Used?

Choose the mounting method from the sign type, weight, wall construction, appearance, maintenance needs, and electrical arrangement. The easiest factory method is not always the best site method.

Common mounting arrangements include:

Mounting Method	Typical Use	Main Items to Confirm
Stud Mounting	Individual letters, logos	Stud diameter, length, spacing, template
Screw Mounting	Panels, plaques, backboards	Hole size, fastener type, wall plugs
Stand-Off Mounting	Halo-lit letters, acrylic signs	Stand-off distance, stud position
Raceway Mounting	Channel letters	Raceway size, holes, power access
Backboard Mounting	Multi-letter logos	Board size, material, fixing points
Bracket Mounting	Blade signs, projecting signs	Bracket size, orientation, wall fixing
Hanging Mounting	Suspended signs	Cable, chain, ceiling points, height
Adhesive-Assisted Mounting	Lightweight interior signs	Surface condition, adhesive compatibility

Individually mounted channel letters usually give a cleaner appearance, but installation can require many drilled holes and separate wire penetrations. A raceway can reduce the number of wall interfaces and provide space for wiring and power supplies, although the raceway becomes visible and changes the overall depth and appearance.

Backboards can help combine several letters or logo elements into one installation unit. Iduoduo’s material records identify several possible backboard materials, including acrylic, aluminum, stainless steel, ACP, PVC, wood, painted metal, and composite panels. Backboards can integrate letters, hide wiring, simplify installation, provide structural support, protect the wall, or create a controlled brand background.

Mounting method should be decided before the final quotation whenever possible because the choice can change:

• Material quantity
• Fabrication time
• Product weight
• Raceway or backboard cost
• Electrical configuration
• Number of wall penetrations
• Packaging dimensions
• Freight volume
• Installation labor
• Required lifting equipment

A 3,000 mm channel letter set mounted letter-by-letter is not necessarily the same product as a visually identical 3,000 mm set supplied on a raceway.

For a blade sign, the bracket is part of the project rather than a minor accessory. The specification should identify bracket orientation, sign projection, attachment position, finish, cable path if illuminated, and service access.

For a suspended indoor sign, confirm hanging height, number of suspension points, cable or chain type, ceiling condition, product weight, and whether power needs to travel through the suspension system.

The mounting drawing should show the factory interface clearly while leaving site-specific structural anchorage to the qualified local party where required.

How Should Mounting Holes and Wire Exits Be Specified?

Mounting holes, studs, and wire exits should be controlled by dimensions or an approved installation template. Leaving them to production-floor judgment can create a sign that looks correct but does not match the prepared site.

For individually mounted letters, the installation package may include a full-size paper template showing:

• Letter outlines
• Letter spacing
• Mounting-hole centers
• Stud positions
• Wire exits
• Sign code
• Overall width
• Overall height
• Alignment reference
• Installation direction

A useful specification can separate the hole and electrical data:

Item	Example
Mounting	Individual Stud Mount
Stud Size	Per approved shop drawing
Template	Full-size 1:1 template
Hole Layout	MP-018 Rev B
Wire Exit	Rear of each illuminated letter
Main Rough-In	Center of logo area
Cable Length	Per approved electrical drawing
Visible Cable	Not permitted
Wall Penetration	Local installer to seal

“Rear wire exit” is often too vague. A better instruction is:

“Rear wire exits according to MP-018 Rev B. Existing building power entry is 180 mm right of sign centerline.”

The same rule applies to mounting holes. If a backboard has six required fixing points, show their distances from fixed edges rather than relying on visual placement.

For replacement projects, existing hole patterns can be extremely important. A new sign may need to align with old façade penetrations to avoid patching stone, tile, metal cladding, or finished interior surfaces. Site teams should provide measured hole locations whenever reuse is required.

For multi-store programs, standardizing mounting patterns can reduce site work, but only where storefront construction allows it. A standardized logo does not guarantee every store has the same wall.

Iduoduo’s channel letter records treat mounting holes, wire exits, templates, raceways or backboards, wall type, and installation method as project inputs. Those records can also be retained for later repeat production.

Wire exits also need weather consideration outdoors. A correct factory cable position does not automatically make the wall penetration waterproof. The local installation team still needs to seal cable entries, penetrations, fasteners, and surrounding building interfaces appropriately.

Hole position and wire position should be approved together. Moving either after a full-size template or electrical rough-in has been prepared can create unnecessary drilling, patching, rewiring, or installation delays.

Is a Raceway or Backboard Needed?

Use a raceway or backboard when it solves a real installation, wiring, structural, or visual problem. Do not add one automatically, and do not remove one simply to make the rendering look cleaner.

A raceway is commonly useful for channel letters when several letters need to share a mounting structure or when wiring and power components need an accessible enclosure.

A raceway specification should normally identify:

• Overall width
• Height
• Depth
• Material
• Material thickness where required
• Surface color
• Mounting holes
• Letter attachment
• Power supply location
• Wiring path
• Removable service cover
• Drainage where required
• Weather protection
• Product weight

Iduoduo’s material records note that raceways commonly use aluminum, steel, stainless steel, or reinforced metal construction. Raceway engineering needs to account for power supplies, wiring, service covers, wall fixing, waterproofing, drainage, surface color, and total weight.

A backboard serves a different purpose. It can combine several letters, create a controlled background, hide wiring, reduce individual wall penetrations, protect a decorative wall, or turn multiple parts into one installable assembly.

A practical comparison is:

Project Condition	Individual Mount	Raceway	Backboard
Clean individual-letter look	Strong	Weak	Medium
Fewer wall penetrations	Weak	Strong	Strong
Concealed shared wiring	Medium	Strong	Strong
Integrated power access	Weak	Strong	Medium
Controlled brand background	Weak	Weak	Strong
Easy factory pre-assembly	Medium	Strong	Strong
Low visual bulk	Strong	Medium	Medium

The choice can also affect freight. A large backboard may increase carton size significantly. A long raceway may become an oversized shipping item. For very large signs, segmentation may need to be planned around both installation and transport.

Color matters as well. A raceway mounted on a light stone façade may become visually dominant if its finish is wrong. Record an exact paint reference or approved finish rather than writing “match wall.”

For halo-lit letters, adding a backboard also changes the illuminated background. Halo quality depends partly on wall or backboard color, surface reflectance, texture, and stand-off distance. Iduoduo’s optical records identify wall reflectance and stand-off distance among the factors influencing the illuminated result.

The selected arrangement should therefore appear in the rendering and shop drawing before approval—not only on the production BOM.

What Site and Outdoor Conditions Must Be Confirmed?

A useful site specification records the conditions the sign will actually face after installation. “Outdoor use” alone leaves too many unanswered questions.

At minimum, consider:

Site Condition	Information to Record
Indoor / Outdoor	Actual use
Rain Exposure	Direct / sheltered
Sun Exposure	Full / partial / minimal
Mounting Height	Height above ground
Wall Material	Actual substrate
Wind Exposure	Sheltered / exposed
Climate	Hot, cold, humid, coastal, etc.
Power Location	Behind wall / remote / raceway
Maintenance Access	Ladder, lift, roof, front/rear access
Drainage	Required path must remain open
Installation Equipment	Lift, scaffold, crane if relevant
Delivery Access	Door, elevator, loading dock limits

A sign mounted 2.5 m above a covered storefront has a very different installation profile from a large set of letters installed 15 m above ground on an exposed façade.

Outdoor projects should also consider:

• Rain and water paths
• UV exposure
• Humidity
• Salt air
• Corrosion
• Temperature
• Wind
• Dust
• Drainage
• Cable entries
• Fastener corrosion
• Service access

Outdoor fasteners require particular attention. Iduoduo’s material guidance warns against ordinary steel corrosion, dissimilar-metal corrosion, trapped rainwater, surface damage, loose fasteners, and inaccessible hardware. Stainless steel, protective coatings, isolating washers, sealing, anti-loosening measures, and protective caps can be considered according to project conditions.

Maintenance access should be planned before the sign is manufactured. After installation, access may still be required for:

• Power supplies
• Controllers
• Removable faces or panels
• Raceway covers
• Light box service openings
• Wiring
• Drainage
• Fasteners

Iduoduo’s installation guidance specifically calls for maintaining access to power supplies, controllers, removable panels, raceway covers, light box service directions, wiring, drainage, and fasteners.

Site responsibility also needs to be written clearly. Factory preparation cannot replace structural calculations, local wind-load checks, building waterproofing, high-access work, permits, or final electrical connection performed locally. Iduoduo prepares the manufacturing-side installation interface, while local installers, electricians, engineers, and project teams handle site-specific structural and regulatory work.

A useful final installation check can therefore include:

• Sign location matches approved elevation
• Overall position and height are correct
• Letters are level
• Letter spacing matches the template
• All mounting points are secure
• Electrical operation is normal
• Lighting and controls operate correctly
• Outdoor penetrations are sealed
• Drainage paths remain open
• Surfaces are clean after installation
• Power and controller access remains possible
• Local project team completes final acceptance

Iduoduo’s documented installation-completion criteria similarly include correct location, coordinated dimensions, level and spacing, secure fixing, reliable structure, normal electrical and lighting operation, completed outdoor waterproofing, clear drainage, clean surfaces, retained maintenance access, and project acceptance.

When mounting and site information is recorded before production, the shop drawing becomes more than a picture of the sign. It becomes a usable bridge between factory fabrication and the real wall where the sign must ultimately fit, connect, light, and remain serviceable.

How Do You Make the Sheet Production-Ready?

A sign specification sheet becomes production-ready when one approved version controls the artwork, dimensions, materials, colors, finishes, lighting, electrical setup, mounting, quantity, packaging, and project schedule. Every unresolved item should be closed before release, older drawings should be withdrawn, and QC should have measurable references for checking the finished product. Production should start from approved files, not email history or verbal instructions.

Which Drawing Is the Approved Production Version?

A quotation drawing, rendering, revised artwork, and production drawing can all exist for the same sign. Only one should control manufacturing.

The production sheet should therefore identify the exact drawing number and revision rather than using phrases such as “latest drawing,” “final version,” or “same as approved.”

A simple revision system may use:

• V1 / V2 / V3
• Rev A / Rev B / Rev C
• Final
• Approved for Production

The naming system matters less than making one version unmistakably active.

A useful production-control block can look like this:

Field	Example
Project Code	RETAIL-US-018
Sign Code	EX-CL-01
Drawing No.	SD-018
Revision	Rev C
Revision Date	Sep 18, 2026
Approval Status	Approved for Production
Quantity	24 Sets
Destination	USA
Production Version	P01
Previous Version	Rev B – Obsolete

The approved drawing should match the specification sheet. If the drawing shows 2,800 mm overall width while the spreadsheet still shows 2,600 mm, production is not ready.

Iduoduo’s documented revision-control process allows drawing stages such as V1, V2, V3, Final, Approved for Production, Revision A, and Revision B. Each change can record what changed, the date, who made the revision, project feedback, and whether the change affects price, lead time, purchased materials, or packaging.

Old versions should not remain mixed with active production files. Once a production version is frozen, obsolete drawings should be withdrawn from the workshop or clearly marked as invalid.

A practical file-release package may contain:

• Final artwork
• Approved shop drawing
• Section drawing
• Electrical drawing
• Mounting drawing
• BOM
• Color schedule
• Finish schedule
• Packaging specification
• QC checklist
• Store or SKU schedule

Production staff should not need to search WhatsApp, email, or meeting notes to determine whether a letter depth changed from 80 mm to 100 mm.

The answer should already be inside the released production package.

How Should Revisions Be Controlled?

Every revision should show what changed and which downstream items need to be checked again.

Changing one field can affect several others. A wider sign may require more material, additional LED modules, different power grouping, a larger backboard, different packaging, and higher freight volume. Moving a wire exit may affect the mounting template and electrical rough-in. Changing indoor use to outdoor use may affect materials, sealing, drainage, fasteners, and power placement.

A revision log makes those connections visible.

Revision	Change	Items to Recheck
Rev A → B	Width 2400 → 2800 mm	Material, LEDs, power, packing
Rev B → C	Return depth 80 → 100 mm	Structure, LED spacing, weight
Rev C → D	Raceway removed	Wiring, holes, installation
Rev D → E	Wire exit moved	Template, rough-in, mounting
Rev E → F	Qty 10 → 35	Material order, schedule, cartons
Rev F → G	Indoor → outdoor	Finish, sealing, drainage, fasteners

The specification sheet should record at least:

• Revision number
• Revision date
• Changed item
• Previous value
• New value
• Person requesting the change
• Approval status
• Price impact
• Lead-time impact
• Material impact
• Packaging impact
• Production status

Changes made after material purchasing deserve special attention.

For example, a finish change from painted aluminum to brushed stainless steel is not simply a visual edit. Purchased metal may no longer be usable. A new acrylic color may need another material batch. A larger letter size may require a different carton. A mounting change may make already-cut backs unusable.

Iduoduo’s project records specifically treat dimensions, font, quantity, color, material, lighting, power, wire exits, mounting holes, raceway, backboard, waterproofing, packaging, and destination as revision-controlled items.

For multi-store projects, revisions should also identify which locations are affected.

A change to Store 018 should not automatically update Stores 001–017 unless the revised requirement applies to the whole program.

A useful rule is:

One revision = one traceable decision.

If a revision changes five items, list all five. Do not write only “updated per comments.”

That level of control becomes particularly valuable months later when a replacement unit or repeat order is required.

What Must Be Approved Before Production Starts?

Production should begin only after every item capable of changing cost, construction, installation, or delivery has been confirmed.

A practical production-freeze checklist can include:

Production Gate	Approval Required
Artwork	Logo, font, spelling, proportions
Dimensions	Width, height, depth, spacing
Materials	Type, grade, thickness
Colors	Pantone/RAL/material sample
Finishes	Paint, brushed, mirror, vinyl, print
Lighting	Front, halo, side, RGB, non-lit
LED	Color/CCT and control method
Electrical	Voltage, power supply, controller
Mounting	Holes, studs, brackets, raceway
Wire Exit	Position and cable arrangement
Quantity	By sign code/store/SKU
Packaging	Protection, labels, accessories
Schedule	Production and delivery dates

Iduoduo’s production-freeze records follow the same logic: logo, dimensions, materials, colors, lighting, power, mounting, quantity, packaging, and project timing are confirmed before one production version becomes active.

Complex or repeatable projects may also need an approved sample or first article.

A sample should not be approved only because “it looks good.” Depending on the product, approval may cover:

• Dimensions
• Material
• Material thickness
• Structure
• Surface finish
• Color
• Face material
• Letter depth
• LED color
• Brightness
• Power supply
• Wiring
• Mounting holes
• Wire exit
• Packaging

Once a sample is approved, its relevant specifications should be transferred into production files rather than relying on workshop memory.

Iduoduo’s sample-to-production records can include Final Artwork, Shop Drawing, BOM, Color Schedule, Finish Schedule, Electrical Specification, Mounting Specification, Packaging Specification, QC Checklist, Golden Sample, SKU, and Production Version.

The sample and volume order also need to be compared before production.

For example:

Item	Approved Sample	Bulk Production	Action
Width	600 mm	600 mm	Match
Acrylic	White cast acrylic	Same spec	Match
LED CCT	Approved white	Same standard	Match
Quantity	1	300	Update
Packaging	Sample carton	Store-coded cartons	Update
Destination	USA	USA	Match
Mounting	Stud mount	Stud mount	Match

A bulk order should not automatically be treated as an exact copy of an early prototype. Material batch, quantity, voltage, packaging, installation, destination, or even artwork may have changed. Iduoduo’s project records specifically call for documenting sample-to-production differences such as size, material, power, voltage, quantity, packaging, logo version, mounting method, color, and destination country.

For a large rollout, a first-store installation or small pilot batch can also be used before releasing every location.

The purpose is not to add paperwork. It is to find a problem while one unit is affected instead of after 100 units have been produced.

How Should QC Requirements Be Written?

QC requirements should tell an inspector exactly what to compare and which approved reference controls the decision.

“Check quality” is not a usable QC instruction.

A stronger QC sheet connects each inspection item to a drawing, BOM, sample, or measurable requirement.

QC Item	Reference	Check
Overall Size	Shop Drawing	Width / height / depth
Material	BOM	Type and thickness
Color	Color Schedule	Approved reference
Finish	Finish Schedule	Surface and consistency
Logo	Final Artwork	Shape and proportions
Lighting	Electrical / Sample	Color and function
Voltage	Electrical Spec	Correct configuration
Mounting Holes	Mounting Drawing	Position and quantity
Wire Exit	Shop Drawing	Correct location
Accessories	Packing List	Complete set
Packaging	Packaging Spec	Protection and labeling
Version	Production File	Current approved revision

Iduoduo’s quality files can include Final Artwork, Approved Shop Drawing, BOM, Color Schedule, Finish Schedule, Electrical Specification, Mounting Specification, Golden Sample, Sample Approval, QC Checklist, Packaging Specification, Product Code, Store Code, and special project requirements.

Inspection should also happen before final assembly.

Material mistakes are much cheaper to find before cutting than after a complete sign has been built. Iduoduo’s material QC can check specification, thickness, quantity, color, surface, light transmission where relevant, flatness, scratches, corrosion, protective film, batch, and conformity with the BOM.

Process inspection can then check stages such as:

• Cutting
• CNC machining
• Bending
• Welding
• Bonding
• Edge quality
• Hole positions
• Painting
• Printing
• LED layout
• Wiring
• Assembly
• Waterproof construction
• Mounting structure
• Packaging

A finished sign should not be the first moment when dimensions or hole positions are checked.

For production involving repeated units, first-article inspection is especially valuable. Continuous production should begin only after the first unit meets the approved requirements. If the first article fails, production should stop long enough to identify the cause, adjust the process, remake the item, recheck it, and update related files before the problem is multiplied.

For illuminated signs, electrical and lighting inspection follows assembly. Iduoduo’s production sequence can include initial lighting, wiring inspection, power-supply inspection, functional inspection, 72-hour pre-shipment testing, reinspection, cleaning, and packaging. Non-illuminated products instead proceed through appearance, dimensional, surface, mounting, and packaging checks.

QC should therefore answer a very practical question:

Does the finished product match the approved project—not merely the product category?

What Packaging and Release Records Are Required?

Packaging should be approved as part of the production specification because a completed sign still has to survive handling, international transportation, sorting, storage, and site delivery.

Packaging requirements should be based on the actual product.

Before production release, consider:

• Is the surface easy to scratch?
• Is acrylic exposed?
• Are there mirror-polished surfaces?
• Are long mounting studs already installed?
• Is the sign oversized?
• Is segmentation required?
• Are power supplies packed separately?
• Are accessories grouped by sign?
• Is the order split by store?
• Is neutral packing required?
• Is private-label packaging required?
• Will cartons be opened and repacked locally?

Iduoduo’s packaging-design inputs specifically include fragility, mirror surfaces, long studs, large acrylic components, wooden-crate requirements, segmentation, store-by-store packing, separated power supplies, reusable packaging, private labeling, and oversized dimensions.

For a multi-store project, the specification may need packaging fields such as:

Packing Field	Example
Store Code	S018
Sign Code	EX-CL-01
Carton No.	S018-01/03
Product Qty	1 Set
Power Supply	Box A
Hardware Kit	HK-S018
Template	Included
Destination	Phoenix Store
Packing List	Attached
QC Release	Passed

Accessories should be controlled just like finished signs. Depending on the project, an accessory list may include screws, studs, nuts, washers, hanging chains, cables, brackets, wall plugs, templates, power supplies, controllers, plugs, connection wires, and spare parts.

A finished sign should not be released simply because fabrication is complete.

A practical release check should confirm:

• Approved production version used
• Quantity complete
• Final dimensions checked
• Materials match BOM
• Colors and finishes approved
• Lighting and electrical tests passed where applicable
• Mounting preparation correct
• Wire exits correct
• Accessories complete
• Packaging passed inspection
• Labels and carton numbers correct
• Packing list matches shipment
• Required test photos or videos saved
• Shipment records linked to the project

Iduoduo’s quality system keeps traceability through incoming inspection, first-article approval, in-process inspection, dimensional and appearance checks, lighting and electrical verification where relevant, 72-hour pre-shipment testing for illuminated products, accessory verification, packaging inspection, reinspection after rework, and product-release records.

Project records can also retain drawings, BOMs, samples, materials, QC checklists, tests, photographs, packaging, shipment information, after-sales records, and corrective actions.

Those records become valuable later. If one sign develops a problem, the team can trace the original drawing, material, LED, power supply, production batch, test record, packaging, installation, and environment rather than trying to reconstruct the order from memory.

A production-ready specification sheet therefore does more than authorize manufacturing. It creates one controlled path from approved drawing to materials, first article, production, inspection, packing, shipment, installation, and future repeat orders.

Ready to Turn Your Sign Specification Into a Custom Sign?

A complete specification sheet makes the next step much easier. If your project already has a logo, drawings, dimensions, quantities, materials, installation details, or lighting requirements, send the available files to Iduoduo for a manufacturing review. Even if several specifications are still undecided, the project can usually begin with the logo, target size, quantity, installation location, destination country, and preferred lighting effect.

Iduoduo can review the sign structure, material selection, illumination, electrical configuration, mounting interface, packaging, and production requirements before preparing a quotation. The purpose of the review is not simply to produce a price—it is to identify missing information that could affect manufacturing, installation, delivery, or later repeat orders.

For a single custom sign, sample, storefront project, or multi-location program, send the project information you already have. Iduoduo can help turn those requirements into a clearer production-ready proposal so you can review the important technical details before manufacturing begins.