A design brief starts with the user's need, the function the product should perform, and the limits it must respect. Describe the job clearly enough to evaluate a design while leaving room for different solutions.
The original classroom example below turns a prescribed object into a functional brief, separates constraints from preferences, and catches a size conflict before construction begins.
Start with the pencil-finding problem
The hypothetical classroom needs a shared pencil station. Pupils should be able to find a short or long pencil without emptying the whole container.
The supplied context gives the team 30 pencils and a table area measuring 20 × 15 cm. The current separation method has not been established. There are no observations of actual pupil use or prototype results in this exercise.
A working brief could say:
Develop a way to organize 30 shared classroom pencils by the supplied short and long groups, so pupils can access one group without emptying the other. The product must fit within the available 20 × 15 cm table area. Confirm the teacher-approved materials before choosing a construction method. Propose and agree a way to check access to each group before making a final design choice.
This leaves several possible forms open. A team can propose dividers, separate holders, or another arrangement and explain how each responds to the need.
VCAA's product-design teaching guidance separates the user's need, product function, and project scope. Its design-brief example distinguishes mandatory constraints from optional considerations and treats the function as something broader than a predetermined solution. Read the design-brief guidance.
Give each statement a clear role
| Element | Entry for this exercise |
|---|---|
| Need | Pupils can find a short or long pencil without emptying the whole container. |
| Function | Organize accessible pencils by the supplied length group. |
| Firm space constraint | Fit within 20 × 15 cm. |
| Materials condition | Use the teacher-approved available list; the list still needs confirmation. |
| Proposed time allowance | Two lessons, subject to agreement; no confirmed production commitment. |
| Optional consideration | Appearance or color, where it helps the design and respects the constraints. |
| Proposed evaluation criterion | A pupil can locate one pencil from each length group without lifting the other group. |
The materials condition is not permission to invent an approved list. The time proposal is not a promise that the object can be built in two lessons. Keeping those statuses visible lets the teacher resolve them before students rely on them.
Pair the criterion with a future check
“Easy to use” leaves the evaluator to decide what counts. The proposed pencil-access criterion names an observable task: locate a pencil from each group while leaving the other group in place.
The corresponding test plan would ask a pupil to attempt that task with a proposed design, then record what happened. Agree the procedure before interpreting a result. This article supplies no participant observations and does not claim that the criterion has been met.
The deliverables at this stage are a brief, concept sketches, and a future test plan. They give the team a basis for choosing and examining a concept; they are not a completed physical product.
Resolve the space conflict explicitly
One initial concept proposes a 25 × 15 cm base. The available table width is 20 cm. The proposed base therefore exceeds that dimension by 5 cm.
Retain the conflict in the review: “Can this concept meet the available footprint, or must the concept change?” Do not silently replace 25 with 20 and assume the design still works. Resizing could affect access, capacity, or construction details that the team has not considered yet.
In the interactive example, inspect the conflicting dimensions and compare the solution-first sentence with the revised functional brief. Classify each entry as a need, function, constraint, consideration, or proposed test to see why its role matters.
Copy this prompt to build your brief
Create a complete self-contained HTML product-design brief worksheet.
My end users and need: [context with supplied observations]. Function:
[what the product must enable, without prescribing its form]. Firm
constraints: [facts]. Preferences: [optional items]. Unconfirmed limits:
[questions]. Proposed criteria and future checks: [details].
Include a separate hypothetical shared classroom pencil station:
30 pencils, short/long groups supplied, available table area20×15cm.
Need: find either group without emptying the whole container. Function:
organize accessible pencils by length group, not prescribe a rotating
wooden box. Current separation method unknown. Materials must come from
teacher-approved available list, not yet confirmed. Two lessons is a
proposed allowance, not a commitment. Color/appearance optional.
Show a solution-first sentence beside an open functional brief. Let
readers classify need/function/constraint/consideration/proposed test.
Proposed criterion: pupil can locate one pencil from each group without
lifting the other group. Show its future observation plan; no actual
users/results. Inspect conflict: proposed25×15cm base exceeds available
20cm width by5cm. Preserve both values and a question; do not silently
resize the concept or imply it works. Deliverables are brief, sketches,
and future test plan; no CAD, manufacture, or safety certification.
Provide blank brief and criterion/test-method fields with missing-need
feedback. Retain typing across views/validation; confirm before reset.
Use labeled keyboard-accessible controls, visible focus, system fonts
at least16px, and 360px layout without horizontal scrolling. Inline
CSS/JavaScript, no dependencies. Return complete HTML.
Return the decision to the design team
Share the prepared brief in NOS before asking students to sketch their preferred object. Let them point to the need and space constraint while explaining their ideas. If the brief still says “rotating wooden box,” directly edit that visible sentence back to the function the class is trying to achieve. The team can then choose a form for a reason it can explain.