Run a pre-mortem to interrupt forward narrative construction

Before committing to a plan, imagine it failed completely — then generate the most plausible story of why.

Why it works

Pre-mortems work by inverting the narrative fallacy: instead of building a story of success after the fact, you deliberately construct a failure narrative before the fact. This interrupts the planning fallacy (which is itself narrative-driven — optimistic stories about future execution) and surfaces risks that the success narrative suppresses. Imagining the failure makes concrete the specific ways the plan could break.

How to do it

1. After building a plan, tell your team or yourself: "Imagine it is one year from now and this plan failed completely. Write the story of why."
2. List the specific failure modes that story reveals.
3. Adjust the plan to address the most plausible and damaging failure modes before executing.

Evidence

Pre-mortem analysis was developed by Gary Klein and tested in forecasting contexts. Prospective hindsight (imagining a future as already happened) improves the identification of failure modes compared to direct risk listing. (observational)

Sources

• Mitchell, Russo & Pennington (1989), back-to-the-future prospective hindsight study
• Klein (2007), "Performing a Project Premortem," Harvard Business Review

Common mistake

Running the pre-mortem as a formality and only generating failure stories that are already expected — the value comes from surfacing failures you weren’t considering.