The Smart Bottle That Nobody Could Open
A student team is designing a 'smart hydration bottle' for hikers. Their design process went: brainstorm features, choose the most exciting idea, build a prototype, then test it once with three classmates. The prototype has a screw lid, an embedded temperature display, and a silicone grip band. In testing, two of three users could not open the lid while wearing gloves, and the display failed after the bottle was dropped from waist height. The team's response was to add a larger display and a second colour option, then submit. Their folio shows sketches, a final render, and a single test photo.
1. Diagnose where the team's design process broke down, using specific evidence from the scenario.
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The process broke down at problem definition and at evaluation.
No clear problem statement or user research. The team began with 'brainstorm features', which is solution-first. There is no evidence of observing hikers or defining needs such as one-handed operation, glove use, or drop resistance.
Selection by excitement, not criteria. Choosing 'the most exciting idea' means no weighted decision matrix or brief criteria were applied.
Inadequate testing. Three users, one test, no drop test until it failed incidentally. The sample is too small and the test conditions (gloves, drops) were not planned.
Failure to iterate on evidence. The test revealed two real failures (glove opening, display durability), but the response added cosmetic changes. This is not iteration; it ignores the data.
Folio does not document the process. Sketches and a final render show product, not thinking. There is no record of decisions, trade-offs, or revisions.
2. Propose a revised process the team could follow, and explain how each stage would have changed the outcome.
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A workable iterative process:
- Define and research: interview or observe at least 10 hikers; write a brief with measurable criteria (for example, 'lid operable with gloves in under 5 seconds').
- Ideate broadly: sketch multiple lid mechanisms (flip-top, large-knob twist, push-pull) before committing.
- Select against criteria: use a weighted matrix scoring each concept on usability, durability, cost, and manufacturability.
- Prototype low-fidelity first: cardboard or 3D-printed lid forms to test grip before embedding electronics.
- Test with representative users: gloved hands, cold conditions, repeated drop tests from 1 m onto concrete, recorded results.
- Iterate on evidence: redesign the lid geometry and relocate or shock-mount the display, then retest.
Each stage changes the outcome: research would have surfaced the glove problem before building; criteria-based selection would have favoured a large-knob lid; representative testing would have caught the display failure; and documented iteration would show genuine design thinking in the folio.