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Premortem template
In a premortem, a team imagines that its project has already failed and writes down why, before the work begins. The point is to hear the doubts people would otherwise keep to themselves while there is still time to act on them.
By Gabriel Lopez · Updated October 26, 2026 · Every source is listed at the end
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Premortem
Fill in the first field before the meeting. Have everyone write their reasons alone before anyone speaks. It saves only in this browser, on this device, and is never sent anywhere.
Name the project and a date in the future. Imagine it is that date and the project has failed.
Example: The new scheduling system, six months from launch.
List every plausible reason, one per line. Include the ones that are awkward to say.
After everyone has shared, pick the few reasons that are both likely and serious.
For each of those, what would you see in the first weeks if it were starting to happen?
What will you do now to prevent or soften each one?
Who owns each change, and when will you look at the warning signs again?
Plain-text version to copy or print
PREMORTEM The project and the date it fails Name the project and a date in the future. Imagine it is that date and the project has failed. ______________________________________________ ______________________________________________ Why it failed (each person writes alone first) List every plausible reason, one per line. Include the ones that are awkward to say. ______________________________________________ ______________________________________________ The reasons that matter most After everyone has shared, pick the few reasons that are both likely and serious. ______________________________________________ ______________________________________________ Early warning signs For each of those, what would you see in the first weeks if it were starting to happen? ______________________________________________ ______________________________________________ Changes to the plan What will you do now to prevent or soften each one? ______________________________________________ ______________________________________________ Owners and the next check Who owns each change, and when will you look at the warning signs again? ______________________________________________ ______________________________________________
Get the editable version: this template as a PowerPoint file with a worked example, in the Change Toolkit. Or learn to use it on your own change in the course Leading Change with Evidence.
How to use it well
These steps are practice suggestions, not tested findings.
Do it while the plan can still change. Klein's article places the premortem in the planning phase, at the outset of a project (Klein, 2007).
Make failure the premise, not a question. Do not ask "could this fail?" Say "it is six months from now and it has failed. Why?" In the article's summary, those with reservations may speak freely at the outset, so that the project can be improved.
Write alone, then share. Give everyone a few minutes of silence to write their reasons before anyone speaks. Then the first voice in the room does not set the list.
Go round one reason at a time. Collect one reason from each person in turn until the lists are exhausted. Write them all where everyone can see them, without debate yet.
Turn the top reasons into plan changes and owners. A premortem that ends with a list and no changes has spent the team's candor without using it. Pick the few reasons that are both likely and serious, and give each one an owner, a change and a warning sign to watch.
Keep the list. Bring it to your first after action review and check which reasons came true.
What the research says
No study in the Evidence Library behind this site tests the premortem, so treat it as a practitioner technique. Its main source is an article by Gary Klein in Harvard Business Review (Klein, 2007). The article's summary describes the method: team members assume the project they are planning has just failed and then generate plausible reasons for its demise. In the summary's words, "Those with reservations may speak freely at the outset, so that the project can be improved rather than autopsied." The article frames the problem as people being reluctant to speak up about their reservations during the planning phase.
The closest tested evidence runs in the other direction in time. A meta-analysis of 46 samples (2,136 people) found that debriefs, structured reviews held after a task, were linked to about 25% better performance on average than comparison groups (d = .67) (Tannenbaum & Cerasoli, 2013, rated High in the Evidence Library after a full-text read). That supports reflecting as a team, not the premortem itself. Whether imagining failure in advance improves a plan has not been tested in the studies reviewed for this page.
How it maps to the Unfrozen Loop
- Week 0Before you start
The premortem's list of failure reasons is a baseline. Keep it, and at each review check which reasons are coming true.
- 1Surface both ways
A premortem is a structured way to surface bad news before it exists. Klein's own description is about making it safe for people with reservations to speak.
- 2Make sense together, top included
- 3Start it close to the work
- 4Review on a rhythm, then hold the pace
- 5The middle’s own weather
- RingSafe to speak, and speaking changes something
It only works if people believe their reasons will be heard without penalty. Thank each one, and show the team what changed in the plan because of them.
Highlighted parts are the ones this idea speaks to. The mapping is my reading, not a tested finding. See the whole Loop and the evidence for each part.
Free lesson: Module 0 of Leading Change with Evidence, about 50 minutes.
Common questions
How do you run a premortem?
Brief the team on the plan, ask everyone to imagine it has failed, and give each person a few minutes to write down every reason they can think of, alone. Then go round the room collecting one reason at a time, pick the most likely and serious ones, and change the plan to address them.
What is the difference between a premortem and a postmortem?
A postmortem, or after action review, looks back at what happened once a project is over. A premortem imagines the failure in advance, while the plan can still change.
Is there research showing premortems work?
Not in the Evidence Library behind this site, which holds no study that tests premortems. The idea is described in a practitioner article, and the closest tested evidence is on debriefs after the fact, which a meta-analysis linked to about 25% better performance on average.
Related
Sources
Entries marked (full text read) were checked against the full paper by the Evidence Library read.
- Klein, G. (2007, September). Performing a project premortem. Harvard Business Review. https://hbr.org/2007/09/performing-a-project-premortem (summary read)
- Tannenbaum, S. I., & Cerasoli, C. P. (2013). Do team and individual debriefs enhance performance? A meta-analysis. Human Factors, 55(1), 231-245 (online 2012). https://doi.org/10.1177/0018720812448394 (full text read)