Why a Design Checklist Matters
A well-designed graphic overlay balances aesthetics, functionality, manufacturability, and cost—but achieving that balance requires attention to dozens of details that are easy to overlook.
Using a comprehensive design checklist ensures that critical decisions are made early, reduces the risk of costly redesigns, and helps communicate requirements clearly to suppliers and internal stakeholders.
This checklist covers 25+ best practices across materials, graphics, dimensions, usability, manufacturing, and compliance to help you create production-ready overlay designs on the first try.
Material Selection and Specifications
Choosing the right materials early prevents performance issues and ensures the overlay can survive the intended operating environment.
Material Selection Checklist
- Substrate Material Specified: Polycarbonate, polyester (PET), polyimide, or vinyl clearly identified with thickness (e.g., 0.25mm PET).
- Hard Coat Requirement Defined: If abrasion or chemical resistance is needed, specify hard-coat type (e.g., 3H, 4H pencil hardness).
- UV Stability Confirmed: For outdoor or high-UV applications, verify substrate and inks are UV-stable and tested per relevant standards.
- Temperature Range Validated: Confirm materials can operate across the full temperature range (-40C to +85C for industrial, wider for automotive/aerospace).
- Chemical Resistance Documented: List expected cleaning agents, solvents, oils, and chemicals; verify material compatibility.
- Adhesive Type Selected: Specify acrylic, rubber, or silicone adhesive with appropriate tack, temperature range, and bonding surface compatibility.
- Flammability Requirements Met: For medical, aerospace, or automotive, confirm materials meet UL94, FAR 25.853, or other flammability standards.
| Material Aspect | Key Questions to Answer |
|---|---|
| Substrate | What material best balances clarity, durability, and cost for your application? Is 3D forming or embossing needed? |
| Surface Finish | Glossy, matte, or textured? Does it need anti-glare or anti-fingerprint properties? |
| Environmental Protection | Will it be exposed to sunlight, moisture, extreme temperatures, chemicals, or abrasion? |
| Adhesive | What surface will it bond to (painted metal, textured plastic, glass)? Is removability or repositionability required? |
| Certifications | Are material certifications (RoHS, REACH, UL, FDA) required for your market or application? |
Graphic Design and Visual Elements
Strong graphic design ensures the overlay is visually appealing, on-brand, and supports intuitive user interaction.
Graphic Design Checklist
- Brand Guidelines Followed: Colors, fonts, logos, and iconography consistent with company brand standards.
- Color Accuracy Specified: Pantone or RAL codes provided for all critical colors; acceptable dE tolerance defined (typically dE < 2.0).
- Text Legibility Verified: Minimum font size meets readability requirements (typically 8pt or larger for labels, 10pt or larger for critical instructions).
- Contrast Ratio Adequate: High contrast between text/legends and background (minimum 4.5:1 for accessibility).
- Icon Clarity Confirmed: Icons are simple, recognizable, and comply with industry standards (ISO 7000, IEC 60417) where applicable.
- Print Bleed and Safe Zones: Artwork includes bleed area (typically 2-3mm) and keeps critical content inside safe zones.
- Layer Organization Clean: Design files have clearly labeled layers for colors, cut lines, emboss areas, windows, and adhesive zones.
- Artwork Resolution Sufficient: Raster images at least 300 DPI at final size; vector artwork preferred for logos and text.
Dimensional Accuracy and Tolerances
Precise dimensions and realistic tolerances ensure the overlay fits correctly in the assembly and aligns with switches, displays, and mounting features.
Dimensional Checklist
- Overall Dimensions Specified: Length, width, and thickness clearly defined on engineering drawings.
- Tolerances Realistic: General tolerances (plus/minus 0.2mm typical) and tight tolerances (plus/minus 0.1mm where critical) called out appropriately.
- Hole and Cut-Out Positions: All holes, windows, and cut-outs dimensioned from common reference edges or datum points.
- Corner Radii Defined: Minimum corner radius specified (typically 1mm or larger) to prevent tearing or cracking during handling.
- Emboss Height/Depth: If embossing is used, emboss height (typically 0.3-0.8mm) and tolerances specified.
- Alignment Features Included: Locating holes, slots, or registration marks for assembly alignment.
- Clearances Verified: Adequate clearance around mechanical features to prevent interference during installation or operation.
| Feature Type | Typical Tolerance | Notes |
|---|---|---|
| Overall Dimensions | plus/minus 0.2mm | Standard for most applications; tighten to plus/minus 0.1mm if fit is critical. |
| Hole Positions | plus/minus 0.15mm | Important for alignment with PCBs, switches, or mounting bosses. |
| Emboss Height | plus/minus 0.1mm | Affects tactile feel and clearance; verify with prototype samples. |
| Corner Radii | 1.0mm minimum or larger | Sharp corners can tear; larger radii improve durability. |
Usability and Human Factors
Good usability design reduces operator errors, speeds task completion, and improves overall user satisfaction.
Usability Checklist
- Logical Control Layout: Frequently used controls positioned for easy reach; related functions grouped together.
- Tactile Differentiation: Critical controls distinguished by size, shape, texture, or embossing to prevent accidental activation.
- Color Coding Consistent: Colors used consistently (e.g., red for stop/emergency, green for start/go) per industry conventions.
- Glove Compatibility: If worn with gloves, key size (15mm or larger) and spacing adequate for gloved finger operation.
- Viewing Angle Considered: Legends readable from typical user viewing angles and distances.
- Backlighting Legible: If backlit, legends remain clear in both lit and unlit states; no hotspots or shadows.
- Labeling Clear: All controls labeled with intuitive, unambiguous text or symbols; critical warnings prominent.
Manufacturing and Production Readiness
Designs that are easy to manufacture reduce cost, improve consistency, and avoid delays during production ramp-up.
Manufacturing Checklist
- Design-for-Manufacturability Review: Supplier consulted early to identify potential manufacturing challenges.
- Printing Method Selected: Screen printing (volume) or digital printing (prototypes/low volume) chosen based on quantity and complexity.
- Color Count Optimized: Minimize number of print colors to reduce setup cost and time (each color = separate screen).
- Cut Lines Defined: Clear die-cut lines provided; avoid extremely tight radii or narrow features that are difficult to cut cleanly.
- Tooling Requirements Clear: Embossing dies, cutting dies, and screen count identified and budgeted.
- Adhesive Pattern Specified: Adhesive coverage, cut-outs, and vent holes clearly indicated to prevent bubbles or contamination.
- Prototype Before Production: Physical prototypes validated for fit, appearance, and function before committing to volume tooling.
| Design Decision | Manufacturing Impact |
|---|---|
| Too many colors | Increases screen count, setup time, and registration complexity; higher cost and lead time. |
| Extremely tight tolerances | Requires premium cutting tools, slower processes, and more rigorous inspection; adds 10-20% to cost. |
| Complex cut-outs | Intricate shapes with many small holes increase die cost and cutting time; simplify where possible. |
| Custom embossing | Requires custom tooling ($500-$2,000 NRE) and adds per-unit processing cost; justify with volume or usability gains. |
Environmental and Regulatory Compliance
Ensuring compliance early avoids delays, costly redesigns, and potential market access issues.
Compliance Checklist
- RoHS / REACH Compliance: All materials meet EU RoHS and REACH substance restrictions if selling in Europe.
- UL Recognition: Materials UL-listed if required for safety-critical applications.
- Industry Standards Met: Medical (ISO 13485, FDA), automotive (IATF 16949), aerospace (AS9100) as applicable.
- Flammability Testing: Materials tested per UL94, FAR 25.853, or other flammability standards as needed.
- Outgassing (Aerospace/Space): Materials tested per ASTM E595 if used in vacuum or sensitive optical environments.
- Documentation Ready: Material certifications, test reports, and declarations prepared for customer audits and regulatory submissions.
Pre-Production Review Checklist
Before committing to production tooling and volume orders, conduct a final review to catch any remaining issues.
Final Review Checklist
- Design Files Complete: All artwork, drawings, and specifications finalized and approved by stakeholders.
- Prototype Validated: Physical samples tested for fit, appearance, usability, and environmental durability.
- Supplier Quote Reviewed: Detailed quote received covering materials, tooling, unit price, and lead time.
- Tooling Approved: Screens, dies, and embossing tools reviewed and approved before fabrication.
- First Article Inspection Plan: Agree on dimensional, visual, and functional checks for first production samples.
- Quality Standards Documented: Acceptance criteria for dimensions, color, adhesion, and defects clearly defined.
- Change Control Process: Process in place for managing revisions, material changes, or design updates after production starts.
Completing this checklist ensures that your graphic overlay design is production-ready, manufacturable, and aligned with functional, aesthetic, and compliance requirements.