Pre-mortem
Definition
A planning exercise in which the team imagines that a project has already failed, then identifies the most plausible reasons for that failure — done before the project begins, to surface risks and blind spots in advance.
The pre-mortem was popularized by psychologist Gary Klein as a counterweight to planning optimism bias. Most planning sessions ask: how will this succeed? The pre-mortem flips the question: assume it failed — why?
Why it works: The prospective hindsight technique (imagining an outcome as already having occurred) produces more and better risk identification than conventional risk brainstorming. When people know the answer — even a hypothetical one — they reason more clearly about causes.
How to run it on a whiteboard:
- The facilitator states: 'It's six months from now. The project failed. What happened?'
- Each team member silently writes failure causes on sticky notes — one per note, 5–7 minutes.
- Notes go on the board. Facilitator groups them into themes.
- The team votes on the most likely and most severe failure modes.
- Top failures become risk items in the project plan, each with an owner and a mitigation.
Pre-mortem vs. risk register: A risk register is often maintained by a PM and reviewed periodically. A pre-mortem is a team exercise that generates the inputs for that register and builds shared awareness of what could go wrong.
Snap the pre-mortem whiteboard with BoardSnap. The AI extracts the failure modes, groups them by theme, and generates action items for the top risks — turning a brainstorm into a risk mitigation plan.
Examples
- A product team runs a pre-mortem before a major API migration and identifies three failure modes: data loss, downtime, and downstream service breakage — each gets a mitigation owner.
- A startup founder runs a pre-mortem before a fundraising round to identify which assumptions could kill the deal.
- An engineering team uses the pre-mortem outputs to build the acceptance criteria for a high-risk feature.
- A consultant facilitates a pre-mortem with a client before a product launch, then feeds the results directly into the launch checklist.
Snap a pre-mortem. Ship its actions.
BoardSnap turns any whiteboard — including this one — into a summary and action plan.