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Decision Support Make a decision 5 min Comfortable Skill 324 of 494

Run a quick premortem on a plan

Works with ChatGPT · Claude

What you’ll be able to do

Imagine the plan failed, then prevent the top causes now.

The problem

Optimism hides the risks that later sink a plan.

What this skill does

AI imagines failure and lists the likeliest causes plus preventions.

When to use it

  • Use before committing to a plan or launch.
Juni, the One AI Skill guide

Juni’s tip

Juni says: it's cheaper to prevent the failure you imagined than the one that surprises you.

The prompt

Main prompt
Run a premortem on this plan: [plan]. Imagine it failed badly — list the most likely reasons and how to prevent each now.
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Try it live

Fill in the blanks — your ready-to-use prompt builds as you type.

Your prompt
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Weak vs. better

✗ Weak prompt

what could go wrong

✓ Better prompt

Premortem this plan: [plan]. Assume it's six months later and it failed. List the 5 most likely causes, rank by likelihood and impact, and give one preventive action for each I can take this week.

Why this works

Imagining failure surfaces risks that a hopeful forward-looking plan glosses over.

Practice task

Try it now

Take a plan you're about to start and run a five-minute premortem.

Self-check

  • Failure causes are specific to this plan
  • Each risk has a concrete prevention
  • Risks are ranked by likelihood and impact

Common mistakes to avoid

  • Listing generic risks that fit any plan
  • Naming risks with no prevention
  • Only imagining mild problems

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