CONCEPT
O-Ring Erosion
The anomalous combustion-gas damage to the rubber gaskets sealing the Space Shuttle's solid rocket booster joints — the specific engineering phenomenon whose progressive normalization across twenty-four flights produced the structural template for Vaughan's framework of catastrophic institutional failure.
O-ring erosion was the technical name for the condition Vaughan's framework made structurally famous. The O-rings — rubber gaskets roughly a quarter-inch in diameter — were designed to maintain a perfect seal between segments of the solid rocket booster, preventing 5,000-degree combustion gases from escaping. The design specification was zero erosion. Beginning with the second shuttle flight, engineers observed that hot gases had eroded the primary O-rings in the booster joints. The erosion was reclassified across subsequent flights from design violation to acceptable operating condition. This reclassification — supported by engineering analysis, documented in official reports, and consistent with the accumulated record of successful flights despite the erosion — became the four-phase mechanism that Vaughan formalized as normalization of deviance.
In The You On AI Field Guide
The erosion was never secret. It was documented in engineering reports, discussed in flight readiness reviews, and assessed through standard organizational processes. Vaughan's central finding was that the