Why it works
In a normal planning meeting, raising doubts feels like being disloyal to the plan. People keep quiet, and the risks they noticed only come out in the post-mortem.
A pre-mortem flips that. Once everyone assumes the project has already failed, finding the reason becomes the task, and the person who spots the biggest risk looks smart instead of negative.
Imagining an outcome as certain also makes the brain much better at generating explanations for it. Researchers call this prospective hindsight.
How to use it
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Declare the failure
Gather everyone involved and state it as a fact, not a possibility.
“It’s six months from now. This project failed badly. What happened?” -
Write reasons alone
Give everyone three minutes to list every reason they can think of, on their own, before anyone talks.
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Fix the top three now
Go around the room, collect the reasons, and change the plan for the biggest ones before you start.