build
2.1.3 - What This Build Is Meant to Teach You, Not Just to Ship - Name the learning goal: say what you believe, what the build needs to answer and what signal will prove or weaken that belief.
prototype :: Using early builds to learn, not to finish or impress.
build
2.1.2 - Where the User First Feels Value Is Where to Start Building - Find the first value moment: point to the moment the user first feels relief or progress and the step immediately before it.
build
2.1.1 - The Only Path Your Prototype Actually Needs to Walk - Define the prototype path: say what the prototype is meant to teach, which path will test it and what signal counts as proof.