Lean UX Framework

A practice-driven approach to UX that replaces heavy deliverables with rapid experimentation, cross-functional collaboration, and continuous learning. Lean UX shifts the question from "What should we design?" to "What do we need to learn?"

Core Principle

Outcomes over outputs. The value of a design is measured not by the fidelity of the deliverable but by the change in user behavior it produces.

The foundation: Traditional UX waterfalls requirements into wireframes, mockups, specs, and code—losing context and hiding untested assumptions at every handoff. Lean UX compresses the distance between idea and evidence: declare assumptions, form hypotheses, run the smallest possible experiment, and let real user behavior settle the argument. Shared understanding replaces documentation; learning velocity replaces pixel perfection.

Scoring

Goal: 10/10. Score a UX process, design plan, or team workflow by the eight-row Quick Diagnostic below: award ~1.25 points per row answered "yes" (8 yeses = 10). Bands:

• 9-10 — assumptions declared, hypotheses with pre-committed success criteria, lowest-fidelity experiments, whole-team design, weekly research, outcome (not output) metrics, dual-track agile, and a recently invalidated hypothesis on the books.
• 5-6 — hypotheses exist but criteria are vague or fidelity is over-invested; design and research still partly siloed.
• <=3 — heavy deliverables, untested assumptions, output-counting, no experiment log.

Always state the current score, the diagnostic rows that failed, and the specific fix for each.