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Advanced Mistake Logs

fix the system, not the person

Some mistakes deserve more than three lines: the missed flight, the lost deposit, the late payment that cost real money. For those, run a short review the way hospitals and airlines do. Ask why until the answer is about the setup instead of about you, then list more than one fix and rank them. "Be more careful" is always on the list, and always at the bottom.

  • Challenging to start
  • Life-Changing impact
  • Learn it in 30 days
  • For the costly ones
one review, start to finish
A review of an expired passport: a chain of four whys down to a cause in the setup, then six rungs of fixes from strongest to weakest What happened: Passport had expired. Found out at check-in; the trip was cancelled. Why: I didn't check it before booking. Why: Nothing asks for a check when I book. Why: The expiry date lives in a drawer, nowhere else. Why: A ten-year task has no reminder at all. The last answer is about the setup, not a person. Fixes, strongest first: Forcing function (can't go wrong): none fits this one. Automation (does it for you): Calendar alert 9 months before expiry, set the day a passport arrives.. Standardise (one way, one place): Every expiry date in one list.. Checklist (a cue at the moment): “Passport valid?” on the trip list.. Rule (a policy to follow): “Always check before booking.”. Education (know more, try harder): “Be more careful.” (crossed out). The chosen fix is the strongest that fits, automation. A check is set for 30 days later: did it happen again? What happened Passport had expired. Found out at check-in; the trip was cancelled. why 1 I didn't check it before booking. why 2 Nothing asks for a check when I book. why 3 The expiry date lives in a drawer, nowhere else. why 4 · the setup A ten-year task has no reminder at all. Fixes, strongest first pick the highest rung that fits Forcing function can't go wrong none fits a passport; next rung Automation does it for you Calendar alert 9 months before expiry, set the day a passport arrives. pick Standardise one way, one place Every expiry date in one list. Checklist a cue at the moment “Passport valid?” on the trip list. Rule a policy to follow “Always check before booking.” Education know more, try harder “Be more careful.” In 30 days: is the alert in the calendar? Did it happen again?

The rungs follow the ranking used in medication safety. The higher a fix sits, the less it depends on anyone remembering anything.

The next one that costs you

Try it now.

Half an hour, once the sting has worn off a little. Pick one mistake that cost money, time or trust. A small one won't repay the effort.

  1. Write what happened, in order

    A short timeline of facts. No "should have" yet; that comes later, and it's usually wrong the first time.

  2. Ask why until you reach the setup

    Keep asking until the answer is about a tool, a place, a habit or a missing prompt, not about a person. It often takes three to five whys.

    "Because I forgot" is a why, not the last one.

  3. List at least two fixes, and rank them

    Place each on the ladder. Can you make it impossible? Make it automatic? Make it standard? Put a check at the moment? Or only a rule, or only "try harder"?

  4. Pick the highest rung you'll actually do

    If the best fix left is "be careful" or a rule, keep looking. Those are the ones that failed this time.

  5. Check in 30 days

    Is the fix in place, and has it happened again? If it has, the fix was too low on the ladder. Climb a rung.

Someone else's mistake? Same review, same rule: the question is what let it happen, not who. People tell you far more when they aren't being judged.

Run a review

Why, why, why, and then what.

Take one that cost you. The page flags whys that blame a person and guesses each fix's rung (change it if the guess is wrong). On the right, the review card sorts your fixes and says when the best one is still too weak.

Why?Keep going until it's about the setup.
FixesTwo or more. The rung is a guess from your words.

Review

What happened goes here.

Why

    Fixes, strongest first

      Check

      Nothing you type is saved or sent anywhere. Copy the review into your own notes before you close this one.

      What the study found

      A checklist, not more care.

      Surgeons are trained, careful people, and operations still go wrong in ways everyone knows how to prevent: the wrong side, a missed allergy, an antibiotic not given in time. In 2007 and 2008 a team led by Alex Haynes, with Atul Gawande among the authors, brought the World Health Organization's 19-item surgical checklist into eight hospitals in eight cities, rich and poor. It's three short pauses: before anaesthesia, before the first cut, and before the patient leaves the room.

      They compared 3,733 patients before the checklist with 3,955 after. Deaths in hospital fell from 1.5% to 0.8%. Major complications fell from 11% to 7%.

      The honest limits: it was a before-and-after study, not a randomised trial, so other changes over the same year may have helped, and teams knew they were being watched. But the shape of the fix is the lesson here. Nobody was told to try harder. A cue was put at the moments things get missed.

      Per 1,000 operations: major complications fell from 110 to 70, deaths from 15 to 8 Two grids of squares, one square per patient with a major complication in every 1,000 operations: 110 before the checklist and 70 after. Below them, one dot per death in every 1,000: 15 before and 8 after. Before 3,733 patients 110 major complications 15 deaths After the checklist 3,955 patients 70 major complications 8 deaths Each mark is one patient in every 1,000 operations.
      Haynes et al. (2009), New England Journal of Medicine: eight hospitals, before and after the WHO checklist. Percentages redrawn per 1,000.

      The idea

      Why blame stops the review.

      "I wasn't careful enough" feels like taking responsibility, and it ends the search. Nothing about the setup changes, so the same moment comes round again and finds the same gap. Asking what let it happen keeps going until there's something to change.

      The ladder comes from medication safety, where the Institute for Safe Medication Practices ranks ways of preventing errors. At the top are fixes that make the error impossible or do the job for you. Next come simpler, standard ways of working, then reminders and checklists. Rules and training sit at the bottom: needed, but weakest alone, because they depend on someone remembering at the worst moment.

      Keep it honest

      Habits that help.

      • Wait a day. Review once the sting is gone, but before the details fade.
      • No names in the whys. "The form didn't ask" gets further than "Sam didn't check".
      • Two fixes, minimum. The first idea is usually a rule. The second is often better.
      • Close the loop. A review with no 30-day check is a story, not a fix.

      Go deeper

      Keep going.

      Practise this in HourLife.

      In Journal: Guided templates. One page per day, written a note at a time, with guided templates, photos, tags, search, a cover and writing insights.

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