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# Discovering story points

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### Discovering story points

1. 1. Discovering story points
3. 3. Estimates take time…and they are never precise
4. 4. Why estimate?
5. 5. First there were hours
6. 6. Hours are dependent on individual
7. 7. Hours are dependent on specialty
8. 8. Hours are translated into duration
9. 9. Brook’s law
10. 10. Wishful thinking
11. 11. People are bad at estimating time
12. 12. People are good at comparison
13. 13. 53 2 1Compare these buildings
14. 14. User story1 2
15. 15. Story pointEffort Complexity Uncertainty
16. 16. Planning poker
17. 17. Velocity2520151050 1 2 3 4 5 6 7 8
18. 18. Time-based planning Will have3 x 15 = 45 points3 x 20 = 60 points Might have Won’t have
19. 19. Scope based planning200 Finish here160 with our best velocity1208040 0 0 1 2 3 4 5 6 7 8
20. 20. 1. How many hours are in a story point?
21. 21. It’s a distribution
22. 22. 2. How to estimate cost?
23. 23. 6 .. 8 x = .. It’s a range
24. 24. 3. Whose points are bigger
25. 25. Only for the same team
26. 26. Beware of inflation
27. 27. Establish common baseline
28. 28. 4. How to calibrate team changes
29. 29. Change of velocity302010 Team member added0 1 2 3 4 5 6 7 8 9
30. 30. 5. How to manage the inflow
31. 31. Burnup chart16012080 Done Scope40 0 0 1 2 3 4 5 6 7 8
32. 32. 6. How do you get started?
33. 33. This is a “2”
34. 34. 7. Why are we back to hours?
35. 35. These areare These different kind of estimates different units
36. 36. 8. What do you burn during sprint
37. 37. Hours Task count Points
38. 38. 9. What if you don’t have a team?
39. 39. … plan an imaginary sprint
40. 40. 10. What if you have different skills?
41. 41. … velocity will help
42. 42. … or different teams
43. 43. Estimate effort, derive duration