Using Silent Grouping to Size User Stories (XP2011)
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This document discusses using silent grouping to size user stories compared to planning poker. It finds that silent grouping takes significantly less time per user story, with average times of 0.2 minutes for silent grouping versus 37 minutes for planning poker. When estimating the time savings for sizing hundreds of user stories across multiple projects, silent grouping could save over 190 hours and $134,000 in costs compared to planning poker. Overall, the document shows that silent grouping provides a much faster and more efficient approach for sizing large numbers of user stories.
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Using Silent Grouping to Size User Stories (XP2011)
- 1. Using Silent Grouping to Size User Stories
- 2. 1 2 3 5 8 13 21 34 ken.power@gmail.com @ken_power
- 3. The Goals of Each Part of Silent Grouping ken.power@gmail.com @ken_power
- 4. 1 2 3 5 8 13 21 34 Do something cool Do something cool Do something cool Do something cool Do something cool Do something cool As a As a As a User Do something cool User User As a As a Do something cool As a I want to I want to I want to User User User do something cool with the do something cool with the I want to I want to do something cool with the As a I want to product product product do something cool with the do something cool with the User As a do something cool with the So that I can product product So that I can So that I can I want to User product benefit in some way benefit in some way So that I can So that I can I want to benefit in some way do something cool with the benefit in some way benefit in some way So that I can product do something cool with the benefit in some way product So that I can benefit in some way So that I can benefit in some way Do something cool Do something cool Do something cool Do something cool Do something cool As a As a As a User Do something cool User User As a Do something cool As a I want to I want to I want to User User do something cool with the do something cool with the I want to do something cool with the As a I want to product product product do something cool with the User As a do something cool with the So that I can product So that I can So that I can I want to User product benefit in some way benefit in some way So that I can I want to benefit in some way do something cool with the benefit in some way So that I can product do something cool with the benefit in some way product So that I can benefit in some way So that I can benefit in some way Do something cool Do something cool Do something cool Do something cool As a Do something cool User Do something cool I want to As a As a As a User User As a do something cool with the I want to User product I want to I want to User As a User do something cool with the do something cool with the I want to So that I can do something cool with the benefit in some way I want to product product product do something cool with the do something cool with the So that I can product So that I can So that I can product benefit in some way benefit in some way benefit in some way So that I can benefit in some way So that I can benefit in some way Do something cool Do something cool Do something cool Do something cool As a User Do something cool I want to As a As a As a User User do something cool with the I want to User product As a I want to I want to User do something cool with the do something cool with the do something cool with the So that I can product benefit in some way I want to product product do something cool with the So that I can So that I can So that I can product benefit in some way benefit in some way benefit in some way So that I can benefit in some way Do something cool Do something cool Do something cool As a As a As a User User User I want to I want to I want to do something cool with the do something cool with the do something cool with the product product product So that I can So that I can So that I can benefit in some way benefit in some way benefit in some way Do something cool Do something cool Do something cool As a As a As a User User User I want to I want to I want to do something cool with the do something cool with the do something cool with the product product product So that I can So that I can So that I can benefit in some way benefit in some way benefit in some way Do something cool Do something cool As a As a User User I want to I want to do something cool with the do something cool with the product product So that I can So that I can benefit in some way benefit in some way Do something cool As a User I want to do something cool with the product So that I can benefit in some way ken.power@gmail.com @ken_power
- 5. Average Time to Size a User Story 50 45 40 Time (minutes) 35 30 25 20 15 10 5 0 P1 F1 U1 C1 P1 F1 U1 C1 Silent Grouping 0.2 0.4 0.3 0.1 Planning Poker 37 36 45 0 ken.power@gmail.com @ken_power
- 6. Using Planning Poker and Silent Grouping 160 140 Number of User Stories 120 100 80 60 40 20 0 P1 F1 U1 C1 User Stories Sized with Silent 70 82 42 150 Sizing User Stories Sized with 10 20 4 0 Planning Poker ken.power@gmail.com @ken_power
- 7. Number of User Stories Per Product 160 140 120 Number of User Stories 100 80 60 40 20 0 P1 F1 U1 C1 Number of User Stories Per 80 102 46 150 Product ken.power@gmail.com @ken_power
- 9. Average EsAmated EsAmated EsAmated Average Time Per Time Time if Time Total Total Time Per User Story Saving Planning Saving EsAmated EsAmated User Story using using Poker using Person-‐ Person-‐ Planning Silent Silent were used Silent Hour Day Poker Sizing Sizing for all Sizing Savings Savings Product (minutes) (minutes) (minutes) (hours) (hours) (Hours) (Days) P1 37 0.2 2575.0 49.3 42.9 515.0 68.7 F1 36 0.4 2917.0 61.2 48.6 437.6 58.3 U1 45 0.3 1877.5 34.5 31.3 563.3 75.1 C1 N/A 0.1 4408.0 73.8 73.5 1175.5 156.7 Totals 0.2 11777.5 218.8 196.3 2691.3 358.8 @ken_power
- 10. Total Total Number Time using Total EsAmated Number of Sized using Planning Number Time Saving User Planning Poker sized Using using Silent HypotheAcal Product Stories Poker (minutes) Silent Sizing Sizing (hours) Cost Savings ($) P1 80 10 370 70 42.9 25,750.00 F1 102 20 720 82 48.6 21,877.50 U1 46 4 180 42 31.3 28,162.50 C1 150 0 0 150 73.5 58,773.33 Totals 378 34 1270 344 196.3 134,563.33 @ken_power
- 11. ken.power@gmail.com @ken_power
- 12. ken.power@gmail.com @ken_power