CONCEPT
Form Follows Failure
Petroski's inversion of the architectural dictum — the proposition that the shape of every successful artifact is determined not by inspiration but by the specific failures of every prior version, each discarded or modified because it broke in some diagnosable way.
Petroski articulated the principle across his career: the function of an object may remain constant for centuries while its form changes continuously, because each form fails in some specific way that the next form attempts to correct. Function is static; failure is the dynamic force that shapes the object over time. The four-tined fork, the modern zipper, the hexagonal pencil — each embodies not its intended function but the cumulative record of every preceding version's specific inadequacies. The principle inverts the popular narrative of design as inspired breakthrough: the pencil you hold was not designed in the modern sense but discovered, through the elimination of every form that failed. This framework becomes uncomfortable for AI-era design, because AI-generated artifacts can incorporate the resolutions of past failures without their users having participated in the failures that produced them.
In The You On AI Field Guide
The principle is empirically derived. Petroski