Product Design & UX ／ Yitang Course Notes
Yitang / Complete Demand Analysis System (4 Stages: Decompose-Deduce-Evaluate-Calculate + JTBD)
Complete notes for the 4-session practical course of the "Demand Analysis" module, a required entrepreneurship course from Yitang 01, plus a 1-page template. Lectured by Truman. The in-depth operating system for the first step "Demand" of Yitang's Five-Step Method: the four-character formula "Decompose-Deduce-Evaluate-Calculate" plus six proficiency levels. Covers ① Peel-and-decompose (Decompose) ② Scenario deduction (Deduce, JTBD framework) ③ Qualitative evaluation (Evaluate, beginner/intermediate/advanced) ④ Calculate the ceiling (Calculate, commercial space sizing). Supporting candy: 1-page template "From Task Insight to In-Depth Demand Deduction" (L1-L4 canvas, AI collaboration version)