Industrial design brief template

1.Product context

The brief opens by anchoring why the product exists, who it serves, and how it fits in the user's environment.

1.1Defining the user

• Primary user personaSpecific. "Outdoor home gardener, age 35–55, weekend hobbyist" — not "garden enthusiast."
• Secondary usersAnyone else who interacts with the product (children, professional landscapers, returning customers).
• Use environmentWhere the product physically lives during use, storage, and transport.
• User skill levelFirst-time, mid-skill, expert. Drives interface complexity.
• Cultural contextCountry, region, household composition. Affects colour, language, and visual cues.

1.2Defining the product role

• Primary taskWhat the user does with the product, in plain language.
• Secondary tasksLess-frequent uses.
• Frequency of interactionDaily, weekly, emergency-only.
• ContextWhere does it live in the user's home / workspace? On a table, in a drawer, mounted to a wall?
• LifespanHow long does the product live with the user?

1.3Anchoring the position

• Competitive landscape2–4 reference products with strengths and weaknesses.
• Brand differentiationHow is this product different from the competition?
• Price tierPremium, mid-market, value. Drives material quality and finish.
• ChannelDTC, marketplace, retail, B2B. Affects packaging and presentation.

2.Form language + brand alignment

The visual language of the product. Not just "what it looks like" but "what it signals."

2.1Form language vocabulary

• Geometric vs. organicSharp angles + parallel lines vs. flowing curves + biomorphic shapes.
• Massive vs. lightVisual weight. Heavy stance vs. floating, hovering.
• Mechanical vs. emotionalIndustrial / engineered look vs. inviting / human.
• Honest vs. theatricalMaterials shown as-is vs. surface that pretends to be something else.
• Symmetrical vs. asymmetricalBalance vs. dynamism.
• High-contrast vs. monochromaticVisual energy.

2.2Brand alignment

A consistent design language across multiple products signals brand maturity. Define:

• Brand pillars3–5 values the product must embody (e.g., precise, durable, approachable).
• HeritageVisual references from prior products in the line.
• Anti-referencesBrands or aesthetics to avoid.
• Mood boardsVisual references for material, finish, proportion, lighting.

2.3Visual hierarchy

Every product has primary, secondary, and tertiary visual elements. Decide before CAD:

• Primary elementWhat does the user see first? (Logo, screen, key button)
• SecondaryWhat signals interactive vs. static (handles, switches, indicators)
• TertiaryLabels, branding marks, regulatory marks
• HiddenWhat should not be visible (screws, vents, manufacturing artifacts)

3.Ergonomics + human factors

The interface between user and product. Often the single largest determinant of perceived quality.

3.1Anthropometric basics

Design for the 5th–95th percentile range. Below 5th = small users excluded; above 95th = large users uncomfortable.

3.2Interactive element sizing

• Button minimum10 × 10 mm (per ISO 9241); 15 × 15 mm for daily-use buttons.
• Touch target (capacitive)9 mm × 9 mm (ISO 9241); 15 × 15 mm preferred.
• Slider travel20–40 mm for full range; ergonomic for thumb actuation.
• Switch throw6–8 mm for tactile actuation; 2–3 mm for momentary.

3.3Force + tactile feedback

• Button activation force0.5–1.5 N (light), 1.5–3 N (medium), 3+ N (heavy).
• Tactile feedbackAudible click + haptic snap (clicky dome switches or membrane switches).
• Detent strengthSlider or rotary detents typically 0.5–2 N.
• Audio feedbackVolume 30–55 dB at typical use distance.

3.4Ergonomic posture

• One-handed vs. two-handedDetermines product mass and grip type.
• Standing vs. sittingAffects screen orientation and button placement.
• Glance vs. focused interactionDriving display contrast and brightness needs.
• Dominant hand considerationRight-handed default; ambidextrous if possible.

3.5Common ergonomic failure modes

• Buttons too small for outdoor / glove use.
• Sliders that require fine fingertip control when context (driving, cycling) precludes it.
• Screens with reflective coating making them unreadable in sun.
• Connectors oriented to be invisible from operator position.
• Cables too stiff to flex during typical motion.

4.Materials, finishes + surface treatments

The tactile + visual layer that the user touches and sees.

4.1Common consumer-product material choices

4.2Surface finishes (plastics)

4.3Coating options (plastics)

• Soft-touch paintAdds tactile feel; ~$0.10–0.30/unit.
• UV-cured pad printFor logos, labels.
• In-mold labelling (IML)Print embedded in plastic; durable.
• In-mold decoration (IMD)Decorative film embedded; premium look.
• Vacuum metallisation (PVD)Adds metallic finish to plastic; ~$0.20–1.50/unit.
• Hard coatAdds scratch resistance.

4.4Metal finishes

• Anodising Type IIDecorative, multi-colour, 5–25 µm thick.
• Anodising Type III (hard anodise)Wear-resistant, 25–75 µm thick, darker.
• Powder coatingInexpensive, durable, many colours.
• BrushedHides minor scratches; directional grain.
• Bead-blastedUniform matte; common for premium electronics.
• PVD platingPremium colours (gold, rose, bronze) on stainless or aluminium.

4.5Colour considerations

• Pantone reference requiredNot just "black" or "blue."
• Physical sample chipColour matched in production lighting (5500 K).
• Material-dependent shiftSame Pantone code may look different on ABS vs. PC vs. anodise.
• Cosmetic variance allowanceDefine acceptable delta-E (typically <3) across production batches.
• Multi-supplier matchingIf using 2+ suppliers, colour-match at golden sample stage.

5.Brief structure + sign-off

The deliverable. Structured for engineering hand-off.

5.1Brief sections

1. Product context — User, role, position, lifespan. 2. Brand alignment — Pillars, heritage, anti-references, mood boards. 3. Form language — Geometric/organic, mechanical/emotional, references. 4. Visual hierarchy — Primary/secondary/tertiary elements; what's visible vs. hidden. 5. Ergonomic specifications — Anthropometric data, force, posture, accessibility. 6. Material + finish specifications — Per-part material, finish, colour. 7. Visual sketches + concept drawings — 5–15 sketches; 2–4 selected for development. 8. 3D concept renders — 2–4 hero angles; key product detail. 9. Reference imagery — Mood boards, material samples, finish references.

5.2Sign-off process

• Internal reviewBrand owner, marketing, engineering lead.
• External review (optional)Design consultant, customer panel.
• Engineering hand-off meetingWalk through every section; document open questions.
• Effective date + revision trackingSame as spec sheet.

5.3Brief revision triggers

• New target market (region affects colour, accessibility, brand).
• Material substitution (PC → PC+ABS changes finish, weight).
• New ergonomic learning (user testing reveals issue).
• Brand evolution (rebranding triggers visual update).

6.Common brief failures

The brief fails when it doesn't survive contact with engineering reality.

6.1Engineering reality checks

• Form vs. wall thicknessSharp corners cause mold sink. Cavity volumes affect cooling.
• Surface finish vs. processPolished surfaces (SPI A1) need premium tooling.
• Material grade vs. costPremium PC adds $0.50–2/unit.
• Painted finish vs. mouldedPainted is cheaper, more wear-prone.
• Asymmetric featuresIncrease tooling cost and assembly complexity.
• Optical quality requirementsMay force specific resin grades.

6.2Brand-engineering trade-offs

• Brand wants "premium feel" + engineering needs "low cost" → Brief must allocate which features get the premium treatment.
• Brand wants single-colour + engineering needs cooling vent → Compromise on vent design or accent panel.
• Brand wants soft-touch coating + engineering needs RF transparency → Coating must be RF-friendly (avoid metallic).