Coaching practices for How to Avoid Planning Fallacy
Describe almost anything you are working through and IX Coach finds the practices whose real-world fit is closest. For How to Avoid Planning Fallacy, these are the strongest matches in the current practice library.
Does this sound like the set of challenges you might be facing?
- I’m all in on this plan and the success story in my head is so vivid I can already taste it
- Every time I plan something I walk through the steps in my head and it feels totally doable in the time I’ve got
- I tend to figure out my plan the same morning I’m supposed to start, in a rush to just get going
- My plan only works if a whole chain of things all go right
- I’m about to commit to this timeline and on paper it all looks fine, but I have a nagging feeling I’m glossing over the ways it could go sideways because admitting them now feels like talking myself out of it before I’ve even started.
Practices that may help
- The Planning Fallacy — Why Your Estimates Are Always Wrong
The planning fallacy is the well-replicated tendency to underestimate completion times even when you know your past projects ran late. The fix is not to "try harder" — it is to switch from imagining the ideal future scenario to consulting your own base-rate history and similar projects. - 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.
The Narrative Fallacy: Why We Can’t Stop Making Stories - Reference class forecasting
Before estimating, look up how long similar past projects actually took — not how they felt.
The Planning Fallacy — Why Your Estimates Are Always Wrong - Separate the planning session from the execution day
Do your planning in a dedicated session, never on the day you intend to start.
The Planning Fallacy — Why Your Estimates Are Always Wrong - Audit plans for scenario inflation
Before committing to a plan that depends on multiple things going right, count the dependencies.
The Conjunction Fallacy — When "More Details" Feels More Likely - Run a premortem before committing
Imagine the project has already failed and work backwards to find why.
The Planning Fallacy — Why Your Estimates Are Always Wrong - Use reference class forecasting for project estimates
Estimate how long similar projects have taken historically before estimating your specific project.
Base-Rate Neglect: Why We Ignore the Odds - The premortem (imagine the project already failed)
Before starting, assume the plan has already failed and ask why — then fix it now.
Premeditatio Malorum, in Depth - Estimate conservatively and act on the conservative number
When uncertain, use a pessimistic estimate as your working assumption — not your best guess.
Margin of Safety - Steelman objections to your own plans
Before committing to a plan, state the strongest case against it in its most compelling form.
Steelmanning
Related concerns
- Planning Fallacy How To Avoid
The planning fallacy is the well-replicated tendency to underestimate completion times even when you know your past projects ran late. The fix is not to "try harder" — it is to switch from imagining the ideal future scenario to consulting your own base-rate history and similar projects.
- Planning Fallacy
The planning fallacy is the well-replicated tendency to underestimate completion times even when you know your past projects ran late. The fix is not to "try harder" — it is to switch from imagining the ideal future scenario to consulting your own base-rate history and similar projects.
- Planning Assumptions
Every plan rests on assumptions — list them and ask how likely each one is.
Name the assumptions that must hold for the plan to work
- Adaptive Planning Uncertainty
Anticipate the specific obstacles most likely to block your plan and pre-decide your response to each.
Plan for obstacles with coping plans
- Planning Assumptions Audit
Every plan rests on assumptions — list them and ask how likely each one is.
- Project Planning Bias
Before estimating, look up how long similar past projects actually took — not how they felt.
Reference class forecasting
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