Decision Graveyard
A public archive of decisions that failed — not because people were careless, but because assumptions aged out silently.
Why this exists
Most serious failures don’t begin with negligence. They begin with an assumption that was reasonable at the time — and then quietly stops being true.
Assumption drift is normal. Systems change. Context changes. Data changes. The risk is when drift is invisible — when “no news” is mistaken for “still true.”
This archive is non-blame by design: calm, surgical autopsies that focus on what changed, what went unobserved, and what could have been tracked.
A few quiet truths
How to use this archive
Read it like a checklist for your next decision — not like a highlight reel.
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Study assumption lifecycles
Learn early-warning signals
Featured decisions
A small set of representative failures across engineering, AI, and operations.
Fixed-interval offshore pipeline inspections
Credit scoring models trained pre-COVID
SaaS pricing locked to early adopter behavior
Automation rollout assuming constant human oversight
Don’t end up here
AssureAI turns decisions into a system of record: assumptions are owned, validated on a cadence, and connected to signals that detect drift early.