PHOTOGRAPHAriane 5: inherited software, changed assumptions
Both inertial reference systems failed, and testing did not expose the guidance software’s limitations.
INDUSTRY COLLECTION
Measurement, verification, reproducibility, and uncertain assumptions.
The organization’s goal, the delivery system, and the conditions of use rarely sit within one discipline. Study this collection alongside cases from other fields to identify which safeguards and decision patterns travel across contexts.
These are illustrative drafts with source references. Collection membership is an editorial classification, not a claim that every case has the same mechanism.
PHOTOGRAPHBoth inertial reference systems failed, and testing did not expose the guidance software’s limitations.
PHOTOGRAPHHubble’s primary mirror had spherical aberration caused by an error in the equipment used to verify its shape.
ILLUSTRATIONA mismatch between English and metric units in ground software contributed to the loss of the spacecraft.
ILLUSTRATIONContact was lost during descent. The leading investigation scenario involved premature engine shutdown after a false touchdown signal.
ILLUSTRATIONThe spacecraft stopped communicating shortly before planned orbit insertion.
ILLUSTRATIONThe sample-return capsule crashed after its parachute deployment system failed.
Use the case evidence to test the question. Avoid treating a plausible explanation as a documented fact.
Use the case evidence to test the question. Avoid treating a plausible explanation as a documented fact.
Use the case evidence to test the question. Avoid treating a plausible explanation as a documented fact.