The Pre-Mortem: Imagine It Already Failed
Klein’s prospective-hindsight technique for surfacing hidden risks
What is a pre-mortem, and how does imagining failure improve a plan?
A pre-mortem, developed by psychologist Gary Klein, has a team imagine that a plan has already failed and then work backward to explain why — before any work begins. The technique exploits "prospective hindsight": research found that imagining an outcome as a certainty makes people generate more, and more specific, reasons for it, surfacing risks that ordinary risk assessment misses.
A normal plan review asks "what could go wrong?" — a question groups answer cautiously, because naming risks can feel like disloyalty to the plan. Klein’s pre-mortem changes the frame: assume the plan has already failed, then explain the failure. That shift turns risk-finding from pessimism into a storytelling task the mind is good at, and it draws on real research showing imagined certainty improves the quality of reasons people generate. Each practice below carries its mechanism and an honest read on the evidence.
Practices
- Run the basic pre-mortem
Assume the plan failed, then have everyone write down why.
- Write reasons independently before discussing
Everyone records failure causes alone first, so the room doesn’t converge too soon.
- Rate each failure by likelihood and impact
Turn the raw failure list into a prioritized set of risks to mitigate.
- Turn top risks into tripwires
Set a specific signal that tells you a feared failure is starting to happen.
- Pre-mortem your personal goals
Apply the technique solo to a habit, project, or life decision.
- Pair the pre-mortem with a clear success vision
Balance failure analysis with an equally concrete picture of what success requires.
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