Coaching practices for Estimation Error Buffer

Describe almost anything you are working through and IX Coach finds the practices whose real-world fit is closest. For Estimation Error Buffer, these are the strongest matches in the current practice library.

Does this sound like the set of challenges you might be facing?

• I land on a number and just go with it, never pausing to ask what’s the most it could possibly be or the least
• I size up what something’s worth and then commit right at that number as if my read is exactly right
• I always tell myself it’ll take this long or cost this much, and somehow it always runs over and I’m scrambling
• I tend to blurt out one confident-sounding number and act like it’s solid, when honestly I have no business being that sure
• My guesses never seem to get any better because I make them, find out the real answer, and then just move on

Practices that may help

1. Sanity-check against known extremes
   Test your estimate against the clearly too-high and too-low bounds to calibrate your range.
   Fermi Estimation
2. Discount your estimate to create a margin
   If you think something is worth X, only commit at a meaningful discount to X.
   Margin of Safety
3. 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
4. Estimate in ranges, not point estimates
   Instead of "my estimate is 500," say "I think it is between 200 and 2000."
   Fermi Estimation
5. Track your estimates and calibrate
   Compare your Fermi estimates to actual figures when you can, and use the gap to improve future estimates.
   Fermi Estimation
6. Practice confidence interval estimation
   Estimate ranges for factual quantities and check how often the true value falls within your range.
   Calibration Training
7. Check units and scales for consistency
   Catch order-of-magnitude errors by ensuring your units are consistent across the estimate.
   Fermi Estimation
8. Log actual vs. estimated time for every task
   Build a personal database of your own estimation errors so you can calibrate future predictions.
   The Planning Fallacy — Why Your Estimates Are Always Wrong
9. Anchor on the base rate before adding inside-view details
   Start your forecast from the class median, then adjust — do not start from your narrative and adjust to the base rate.
   Reference Class Forecasting
10. Distinguish cognitive optimism bias from strategic misrepresentation
    Recognize that some forecast inflation is genuine bias and some is deliberate spin — they require different fixes.
    Reference Class Forecasting

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