usability-testing

A practitioner's guide to running effective usability testing, distilled from frameworks and quotes contributed by 11 product leaders. Rather than prescribing a single method, it structures the work into four steps: clarify the goal (validating a concept, finding friction, or optimizing conversion), choose the right fidelity (Wizard of Oz, fake doors, prototypes, or production testing), design the test (recruiting, scenarios, what to observe), and plan for iteration so findings flow back into development. Core principles anchor each idea to a named leader. Itamar Gilad's "fake it before you build it" argues for fake-door, smoke, and Wizard of Oz tests, validating value propositions with human-powered facades before writing production code, and later for progressing through fish-fooding, dogfooding, and alphas to build confidence. Melanie Perkins notes that as few as 10 random people can reveal representative friction. Uri Levine urges watching users rather than only asking them, and probing "why" when they deviate from the expected path. Kristen Berman insists on testing multiple options relatively rather than a single design. Guillermo Rauch warns about creator bias and overrating one's own product. Judd Antin's Airbnb example, changing seven characters on a button that "felt scary," shows how micro-level copy fixes can move millions in conversion. Noah Weiss frames testing as a team sport, with PMs, engineers, designers, and researchers live-reacting to sessions in a shared Slack thread. The skill supplies clarifying questions to pose and a list of common mistakes to flag: testing only one design, building before validating, trusting internal intuition, ignoring micro-level issues, and testing in isolation. A deep-dive reference collects all 14 insights from the 11 guests. Suitable when planning user tests, designing prototype validation, preparing studies, or trying to understand why users struggle with a product.