I jumped straight into physical UI stuff, lower buttons, braille labels, and the interviewer just kind of waited.
Start by clarifying the scope: which disabilities, what vending context, and what constraints. Then frame the problem around accessibility principles (perceivable, operable, understandable, robust) and propose a solution that benefits all users, not just those with disabilities. Structure your answer by defining user needs, ideating features, prioritizing with a simple framework, and discussing trade-offs and success metrics.
Pro tip: Anchor your design in universal design principles and reference relevant standards like WCAG or the ADA to show domain knowledge. Also, emphasize that accessibility features often improve usability for everyone, which strengthens the business case.
Ask clarifying questions to define the target users (e.g., mobility, visual, hearing, cognitive disabilities), the vending environment (indoor/outdoor, space constraints), and business goals (e.g., inclusivity, revenue).
Map out the key challenges each disability group faces with traditional vending machines, such as reaching buttons, reading displays, or hearing audio cues.
Brainstorm features that address these needs, leveraging universal design: adjustable height, tactile buttons, voice guidance, screen readers, mobile app integration, and alternative payment methods.
Use a framework like RICE or MoSCoW to prioritize features based on impact, cost, and feasibility. Discuss trade-offs such as cost vs. accessibility, and how to phase implementation.
Propose metrics to measure success, such as usage by people with disabilities, satisfaction scores, and compliance with accessibility standards.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.