Downloaded 364 times
Uploaded byAlex Kanaan, SPC5, CSP, ACC, ATF
User Story Sizing using Agile Relative Estimation
The document discusses the limitations of traditional project planning and the advantages of relative estimation in agile methodologies. It emphasizes the use of story points over hours for sizing tasks, allowing teams to make more accurate estimates by comparing work rather than trying to predict exact durations. The presentation also highlights techniques such as planning poker and the importance of including all efforts in the estimation process.
More Related Content
![[HCM Scrum Breakfast] Agile estimation - Story points](https://cdn.slidesharecdn.com/ss_thumbnails/storypointsestimations-160827052054-thumbnail.jpg?width=640&height=640&fit=bounds)
Similar to User Story Sizing using Agile Relative Estimation
![5G Explained! A High Level Overview [Introduction]](https://cdn.slidesharecdn.com/ss_thumbnails/5gexplainedahighleveloverview-260119165306-cc137a3e-thumbnail.jpg?width=640&height=640&fit=bounds)
User Story Sizing using Agile Relative Estimation
- 1. Story Sizing using Agile RelativeEstimation Alex Kanaan
- 2.
- 3. Connect with Me! ClickButton For Direct Access More about Me http://www.alexkanaan.com Read My Blog http://www.alexkanaan.com/#latestnews Contact Me http://www.alexkanaan.com/#contact Follow my Tweets @AlexKanDu Connect on LinkedIn https://www.linkedin.com/in/arkanaan
- 4. Let’s Get toKnow You! • Waterfall Experience • Agile Experience • Beginners • Intermediate • Advanced • Scrum • Kanban • SAFe
- 5. Question How long doesit take 2 PM’s to change a lightbulb?
- 6. Question How long doesit take 2 PM’s to change a lightbulb? HINT: THINK!!!
- 7. Question How long doesit take 2 PM’s to change a lightbulb? Answer: Do you have a plan?
- 8. Traditional Project Planning Creatinga project plan is simple? Identify tasks, durations & dependencies Find out who will do the work & estimate how long it will take them to do it Plug all into MS Project and voila! So one person assigned to a task that takes 48 hours, will finish it in 6 days, right?
- 9. Whoa...Whose Days Looklike this?*
- 10. Out-of-Time? So how manyhours do you really have left to actually do the work in the plan?
- 11. Planning for an8 hour day? Assuming 8 hrs a day to allocate to tasks is not realistic!! What should we do?
- 12. Problems with TraditionalEstimates We spend too much time doing/redoing it But we rarely get it right - Fear of failure Lack of confidence/experience People are either pessimistic or optimistic Timeline may be too far into future Many unknowns, changes, dependencies
- 13. Traditional Planning So howdo we estimate accurately how long it will take to get things done?
- 14. Traditional Planning So howdo we estimate accurately how long it will take to get things done? Answer: You cannot!
- 15. Self-Organize & Provethe Following! Fact: Humans stink at Estimating!
- 16. So, Do EstimatesWork?
- 17. Traditional Planning “It isbetter to be roughly right... than precisely wrong” John Maynard Keynes
- 18. Solution? Use RelativeEstimation
- 19. Relative Estimation Educated “finger-in-the-air”guess-timate that works!! Used in Product Backlog Uses comparing vs deconstructing Allows you to select a predictable volume of work to be done in a sprint Basis to do capacity based planning
- 20. Sizing - WhyRelative Estimation Uses a Simple Scale Normalized Story Points Quick Estimates - Sizing a story K.I.S.S. - Keeps it Simple It’s all relative - comparing & evaluating one story to another
- 21. Sizing - WhyRelative Estimation Allows PO to make tradeoffs Allows you to take on low hanging fruit first (more valuable stories)
- 22. Let’s Get Started! Let’slearn how to use relative sizes for comparison
- 23. How Much doesa Terrier Weigh? (estimate)
- 24. No Idea? Because wearen’t comparing it to anything...yet!
- 25. So...Which Dog isHeavier?
- 26. Where do wefit a Golden Retriever?
- 27. Between Chihuahua &German Shepherd
- 28. Let’s Up theChallenge! Lets use relative sizes to help us “fit” something new to our scale below
- 29. Where do youfit a Terrier on the scale?
- 30. More or Lessthan a German Shephard?
- 31.
- 32. More or lessthan a Retriever?
- 33.
- 34. More or lessthan a Chihuahua?
- 35.
- 36. About the sameas a Chihuahua
- 37. How Much Doesa Terrier Weigh? HINT: This is what we know • Less than a German Shephard • Less than a retriever • About the same as a Chihuahua • But...we don’t know what a Chihuahua weighs Can You Answer NOW?
- 38. What If YouHad this Table?
- 39. Can You AnswerNOW?? (estimate) How much does a Terrier weigh?
- 40. Yes…The Terrier Weighs... Roughlyabout the same as a Chihuahua, or 4-6 Ibs
- 42. So how doesthis work in Agile? We create buckets of standard story sizes and ‘fit’ new stories in these buckets
- 43. Do We IncludeTesting in Estimates?
- 44.
- 45. YES: Include itALL! ALL efforts in the process are included in the size estimate - including any spikes
- 46. What is this? 1,2, 3, 5, 8,13
- 47. What is this? ModifiedFibonacci Sequence 1, 2, 3, 5, 8,13 20, 40, 100, 200
- 48. Size is notbased on effort alone Unlike Waterfall, when we size stories, we do NOT base it on effort alone!
- 49. More to Sizethan Effort alone! Story Point Size is based on at least Effort Complexity Doubt
- 50. Effort Doubt Complexity Same Effort -Different Size 5PT Effor t D C 1PT Both stories have the same effort, why is the estimate so different?
- 51.
- 52. Using T-Shirt Sizingfor your buckets Small 1pt Medium 2-3pt Large 5pt Extra Large 8 Points TOO BIG - Break into Smaller Stories
- 53. Normalized Story Points •Pick a 1 pointer roughly equal 1 day • Agree with Team this is your one pointer in terms of effort, complexity and doubt • Compare new stories to it • Remember to use same scale within team
- 54. Planning Poker Consent basedestimation technique I don’t use it with my teams because I find developers are much more comfortable with giving a relative number rather than an exact number Mike Cohn’s Website for a good explanation
- 55. Do we usehours in planning? Yes: In sprint planning where your planning horizon is only your 2-3 weeks - sprint length
- 56. Remember the Mantra! Pointsfor Stories, Hours for Tasks!
- 57. Points for Stories,Hours for Tasks! Estimate Using When? For What? Stories Points Refinement Velocity Tasks Hours Sprint Planning Burndown Chart
- 58. Tips on Sizing •Avoid confusion: Sizing vs Estimates • Use Story Points - choose & stick to scale • Break large stories to multiple small stories • Smaller stories have less uncertainty & easier to estimate more accurately • Only an estimate, don’t spend too much time • Team sizing efforts get better with time
- 59. Relative Sizing Advantages •Sprint planning in minutes not hours! • Less Stress: Team doesn’t worry if estimates are not spot-on • Meeting sprint commitments starts to improve each sprint • We now have historical velocity that can be used towards future planning and accepting new projects
- 60. Next Steps… If youliked my presentation, connect with me from the next page for more ☺
- 61. Connect with Me! ClickButton For Direct Access More about Me http://www.alexkanaan.com Read My Blog http://www.alexkanaan.com/#latestnews Contact Me http://www.alexkanaan.com/#contact Follow my Tweets @AlexKanDu Connect on LinkedIn https://www.linkedin.com/in/arkanaan