Why do build-versus-buy decisions often go wrong in technology organizations? The episode argues that the choice should not begin with cost, speed, or vendor features, but with one central question: is the capability inside or outside the organization’s zone of differentiation? It outlines common failure modes, including poor cost comparisons, wrong decision ownership, and treating build versus buy as a simple binary. The episode then presents a seven-question framework covering total cost of ownership, urgency, lock-in, vendor risk, internal capacity, reversibility, and AI-specific uncertainty