Term Kind Topic What it is
Build versus Buy practice Build vs Buy Whether to build a capability or acquire it — decided primarily by whether the capability differentiates, not by whether you could build it.
Strategic Sourcing Decision practice Build vs Buy A build-versus-buy decision framed around competitive differentiation and organisational capacity rather than a comparison of visible costs.
Vendor Reversal Cost Buy Unwind Cost, Vendor Disentanglement Estimate metric Build vs Buy The engineer-months needed to unwind a buy decision - dominated by business logic that leaked into the vendor's configuration rather than by anything the contract's termination clause covers.