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Right-Sizing User Stories
- 2. © 2011 VersionOne 2 • Steve Ropa – Steven.ropa@versionone.com – Agile Coach – Certified Scrum Master – Certified Scrum Product Owner – 19 years software development • 11 years programming • 8 years director of development – 10 years Agile experience • XP • Scrum – http://blog.versionone.com/blog/agile- musings
- 3. © 2011 VersionOne 3 What is a User Story? Functionality Valuable User Role
- 4. © 2011 VersionOne 4 Three Parts of a User Story Conversation Confirmation Card
- 5. © 2011 VersionOne 5 INVEST - Attributes of a good Story Independent Negotiable Valuable Estimable Sized Appropriately Testable
- 6. © 2011 VersionOne 6 So What is “Sized Appropriately?
- 7. © 2011 VersionOne 7 Sometimes its easy to tell….
- 8. © 2011 VersionOne 8 Other times, its all relative
- 9. © 2011 VersionOne 9 • A single team can develop this story in a single iteration • If we are going to do more than one story in an iteration, we might want to shrink that a bit… A story should be small enough that….
- 10. © 2011 VersionOne 10 What can we do to break a big story into smaller ones?
- 11. © 2011 VersionOne 11 • Functional lines – When I log in, if I use the right user name and password, I can get to the main page where I can start shopping for great buys from Hershey’s, Mars, and Necco. • I can login with the right user name and password • I can’t login with the wrong user name and password • I can shop for candy from… – Hershey – Mars – Necco We can break it along…
- 12. © 2011 VersionOne 12 • When I log in I can shop for candy at any store I like. If I’m a premium user, I can also get a list of where my favorite candy is available cheap, by candy type. If I’m a regular user, I can only see lists of stores that are selling candy online… User Roles…
- 13. © 2011 VersionOne 13 • As any user, I can login to the system with my user name and password. Login
- 14. © 2011 VersionOne 14 • As a regular user, I can see lists of stores that are selling candy on line, and navigate to that store for my shopping. Regular User
- 15. © 2011 VersionOne 15 • As a premium user, I can see a list of my favorite kinds of candy, with links that will take me to where I can get the best price. Premium User
- 16. © 2011 VersionOne 16 Every team is different Some teams want to work one good sized story together Others want a bunch of small stories that can be distributed among the team
- 17. © 2011 VersionOne 17 Is there such a thing as a story that is too small?
- 18. © 2011 VersionOne 18 • Until we start developing it – Break out the smaller stories now – Leave enough substance in the initial story to have something to show for your work. Sometimes, the story looks ok….
- 19. © 2011 VersionOne 19 • What are some examples of a story that “feels” too big? • How might we break it down together? Audience Participation
- 20. © 2011 VersionOne 20 The goal for a story is “Done”
- 21. © 2011 VersionOne 21 Not just “Dev Complete”…
- 22. © 2011 VersionOne 22 Thank you, and any questions?
Notes de l'éditeur
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- What is a User Story?A User Story describes functionality that will be valuable to a User Role of a system or softwareUser Stories are composed of 3 aspectsCardConversationConfirmation
- There are many different sizes of users story. No one size fits all, and what might appear very large to some teams might appear to be just fine to others.
- Sometimes, a story is so large that we really don’t need a lot of extra analysis to know that they are just too large for words. In most shops, these stories are called epics.
- Relative scale is really the crux of story sizing.
- Really, as long as a story is satisfying those INVEST principals, there really isn’t a size limit on the small side. It can be taken to the extreme, but in the end it is about providing some level of business value to the customer.
- We really want our stories to be sized so that we don’t carry them over very often. If we can keep in mind that our goal is to provide a piece of functionality that can actually add value, no matter how small that value is, we will go a long way into finding the right sized stories for us.
- Too often I will hear “well we finished the story, but the testing had to wait until the next iteration”.