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Effective story slicing

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Effective story slicing

  1. 1. effective story slicing Neil Killick, Agile Coach / Trainer neilkillick.com / iterative.com.au Copyright Neil Killick, Iterative, 2014 neil_killick
  2. 2. Why slice stories
  3. 3. Here’s why
  4. 4. Slicing creates options and exposes goals from solutions
  5. 5. Why should we make explicit slicing policies? ● ● ● ● Better definition of “ready” and “done” Measure cycle times for work types We can inspect and adapt policies Try and reduce instance of outliers
  6. 6. Shared definitions of work types are important “Theme” User registration “Feature” Forgotten password “Story” Email user
  7. 7. Slice by Acceptance Criteria ● Given Bob is a registered user, When Bob logs in Then he should be logged in. ● Given Bob is logged in, When Bob chooses Profile Then he should see his profile.
  8. 8. Each user scenario is its own story
  9. 9. Keep vertically slicing (user end-to-end functionality)
  10. 10. Workflow steps
  11. 11. Variation in business rules
  12. 12. Happy/unhappy flow
  13. 13. Input options/platform
  14. 14. Data types/parameters
  15. 15. CRUD operations
  16. 16. Test scenarios
  17. 17. Roles/personas
  18. 18. Other ways to slice ● ● ● ● ● ● “Implement the 1st X, then the rest” Delay performance considerations Delay UI considerations Look for “and”, “or” in scenarios Browser compatibility Usability
  19. 19. Hamburger Method
  20. 20. Step 1 - Identify tasks ● Story: Contact dormant customers by email ● Accomplishing all tasks would meet goal of story Lettuce V e r t i c a l s l i c e Tomato Burger Onions Tomato sauce
  21. 21. Step 2 - Identify options
  22. 22. Step 3 - Trim the burger options
  23. 23. Trimmed, ready for 1st bite
  24. 24. Step 4 - Take the 1st bite
  25. 25. Each bite is a story the PO may or may not want done ● ● ● ● Keep taking a bite until “good enough” Iterative = Be open to rework Horizontal slices don’t deliver value Conversations with the PO are key ○ Communicate technical risk ○ Focus on early value delivery
  26. 26. Group Activity Make your own burger! ● Story: I want customers to be able to buy my artwork from my website ● Use the Hamburger Method to slice this story ● You have 15 mins to: ○ Identify 5 or 6 tasks/stories ○ Identify options for each in order of quality
  27. 27. Neil Killick, Agile Coach / Trainer neilkillick.com / iterative.com.au Copyright Neil Killick, Iterative, 2013 neil_killick
  28. 28. References ● 8 useful strategies for splitting large user stories (and a cheat sheet) - http://bit.ly/1jrdWOY ● Splitting user stories: the hamburger method http://bit.ly/1eL8HHW ● Splitting user stories by the quality of the solution - http://bit.ly/1ejFRZ3

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