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Case file

Optimism Bias

Filed under
Need To Act Fast

The charge

We expect our future to go better than base rates justify, especially for risks, timelines, and outcomes under our control.


How it operates

Positive scenarios are easier and more motivating to imagine than obstacles, so friction and bad luck get underweighted.

Logged incidents

  1. Incident 01

    A startup plan assumes a sales ramp faster than almost all comparable launches.

  2. Incident 02

    An engineering leader expects a migration to finish without major incidents despite a messy dependency map.

  3. Incident 03

    An investor focuses on upside narratives while discounting dilution and execution risk.

What to watch for

It shows up when plans sound smooth and downside cases feel like edge cases. Ask: 'What would the outside view predict for a case like this?'

Recommended action

Use reference-class forecasting and a premortem before committing resources.

Known associates

Source of record

en.wikipedia.org

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