Philosophical setup instructions for TagTime

TagTime
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Just did some math on the question of how much time you have to measure with TagTime for the estimate to be probably approximately correct:

  • If TagTime says you spent 45 minutes there’s an 86% chance it was really between 0 & 2 hours
  • If TagTime says you spent 3 hours there’s a >90% chance it was really between 1 & 6 hours
  • If TagTime says you spent 6 hours there’s a 71% chance that’s within 37% of the truth
  • If TagTime says you spent 8 hours there’s a 67% chance that’s within 33% of the truth
  • If TagTime says you spent 9 hours there’s a 74% chance it was between 6 & 12 hours
  • If TagTime says you spent 35 hours there’s an 80% chance that’s within 20% of the truth
  • If TagTime says you spent 40 hours there’s a 90% chance it was between 32 & 50 hours
  • If TagTime says you spent 80 hours there’s an 86% chance that’s within 15% of the truth
  • If TagTime says you spent 220 hours there’s a 90% chance that’s within 10% of the truth
  • If TagTime says you spent 50k hours there’s a 99% chance that’s within 1% of the truth

(Of course increasing the frequency of pings from the default of once per 45 minutes gives you tighter estimates faster.)

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