Product design question

How would you re-design the carwash?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Creative redesign thinking applied to a familiar physical service, testing structured reasoning under an unusual prompt.

Clarify what 'redesign' targets: the physical wash experience, the booking and payment flow, or both.
Identify user pain points: unpredictable wait times, opaque pricing tiers, and uncertainty about wash quality before paying.
Prioritize wait time and pricing transparency, since these are the most commonly cited frustrations with car washes.
Propose an app based booking system showing real time bay availability and a transparent, itemized price for each wash tier.
Add a subscription model for frequent customers, offering unlimited monthly washes for a flat fee to build recurring revenue.
Define success as reduced average wait time, increased subscription attach rate, and repeat visit frequency.

Grounds the redesign in real, specific pain points, wait time and pricing opacity, rather than reinventing the physical wash mechanics with no clear reason.
Proposes a concrete, provenly successful business model, subscription car wash, which several real chains have adopted successfully.
Gives an illustrative number, e.g. assumes a $25 per month unlimited plan could double visit frequency for regular customers.
Ties the redesign to measurable outcomes, wait time and subscription attach rate, rather than stopping at a feature description.

Focusing only on physical redesign of the wash mechanics with no product or business model thinking.
Ignoring pricing transparency, a widely cited real frustration with car wash pricing tiers.
No success metric tied to the proposed changes.

Chapters of the AI PM course that teach what this question tests.