story points v2
TRANSCRIPT
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User story points
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Why we estimate?
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Why story points NOT hours?
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From the latest Standish group survey
68%Fail to meet original
estimates
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We are not good at estimation
Acceptable numberProject is too
big
Deception: best/worst case
And also…
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Software projects are complex
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Software projects are complex
maintainability
testabilityscalability
security
changing requirementsHours estimation is not good enoughWhy story points?
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More accurate
Comparing size
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Less variation
Stable reference stories
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70 minutes 30 minutes
VS
Office to People square
140 minutes 60 minutesOffice to the bund
Difference
40 minutes
80 minutes
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Continuous improvement
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20km
30km
40km
sprint sprint sprint
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Release planning
Velocity
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Start using story point?
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1 dimension: Effort
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2 baseline user stories
“2” & “5”
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Compare size to baseline storiesFrom start to “Done”
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Improve estimation
Inspect & Adaptive
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Key take away• Estimation is a skill. It requires practice
• Baseline stories need to be understood & accepted by all team members
• Baseline stories should not changed from sprint to sprint till you (the team) are too fast
• Make comparison based on effort, not complexity, not business value, etc. 1 thing in a time
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Try: estimation exercise
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Try: decide 2 baseline user stories with your team
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Thank you!