2026 — Supplier reliability was assumed without disruption modeling
The decision failed because a temporary supply relationship was treated as permanent.
No disruption scenario was modeled.
Failure Type: → Assumption Failure
Crux: → Permanence Illusion
Case
A hardware manufacturer committed to a production schedule assuming its single-source supplier would remain stable throughout the contract period.
Decision Error
Supplier reliability was assumed without validation.
Why It Failed
The condition was temporary but treated as permanent.
Trigger
Short-term supply reliability was extrapolated.
Missed Signal
No supplier disruption or single-source dependency scenario was analyzed.
Rule
If stability is assumed, test for change before committing.
Compare / Similar Failures
Often confused with:
→ Contradictory signals were ignored
Key Difference:
Confirmation Bias Lock results from dismissing visible supplier risk signals, while Permanence Illusion results from never modeling supplier disruption as a scenario at all.
Boundary:
If supplier risk signals were present and dismissed → Confirmation Bias Lock.
If no disruption scenario was ever modeled → Permanence Illusion.
Related Cases
→ Regulation was treated as stable without policy shift modeling
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