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Phoenix User Group Slides



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  • 1. Simplifying Scrum Online Phoenix Scrum User Group May 21st 2009
  • 2. Brightspark – who we are  Privately funded technology company  Toronto based  Founded in 1999  Founders are serial entrepreneurs Rails shop focused on building internet businesses. We also do outsourced Rails development work Our process is Scrum and XP
  • 3. Brightspark 3.0 – Our Mission Build leading edge Internet businesses using core competencies in web application software development   
  • 4. Jack Milunsky – Little bit about myself  20 year software veteran  Led Teams both large and small Worked on many successful projects and some failed ones  Most of my career was based on Waterfall  Practicing Agile for almost 5 years  CSM certification
  • 5. What is Agile  Agile = Scrum + XP for most companies practicing agile  PLUS Lean is creeping into the picture more and more now Agile means  Iterative incremental development  Engineering discipline (process and quality)
  • 6. Most Important Agile benefits Two major Agile benefits:  Transparency  Means you get to see exactly where things are at all of the time  Rhythm (heartbeat)  Deliver soon and deliver often - this means you mitigate risk
  • 7. Additional benefits Two major problems that kill productivity  Churn  Code quality/Technical debt Scrum helps mitigate this through:  Uninterrupted time for developers to get their work done  Build quality in right from the start
  • 8. Lean thinking quot;Stop Starting, Start Finishingquot; “If you don’t know how to get the story out of the iteration – don’t let it in”
  • 9. Lean thinking  Lean thinking  Minimize Work In Progress  Work in progress = Liability  Focus on cycle time rather than productivity  We ship every 2 weeks – DEPLOYED TO PRODUCTION  This means you can’t have too much in the pipeline  Fix the bugs when you find them “ Defect tracking systems are queues for partially done work” - Mary Popendiek
  • 10. The biggest risks of All #1 There is no greater risk than delivering the wrong product Mitigating business risk…  Deliver early and often  Iterate, Inspect and adapt  Involve the customer and stakeholders
  • 11. Technical debt #2 Technical debt can kill companies by painting them in a corner. Tell tale signs:  Features take longer and longer to get implemented  Releases have longer cycles  Ever increasing QA cycles  Increase release bug counts  Increase in support calls/emails  Unsatisfied customers  Internal Morale problems Fewer individuals on the team that know the entire codebase
  • 12. Technical debt Mitigating risks in regards technical debt What you want is an Agile Architecture and codebase  Strong engineering discipline – setting the dials to ten  Emergent Architecture – the antithesis of BDUF  Unit test coverage – strive for 100% we have 95% coverage  Pair programming  Definition of Done
  • 13. Emergent architecture Make room on your backlog for refactoring 20% of our time devoted to refactoring out codebase every sprint  This requires discipline – so tempting not to do this  Requires buy-in from stakeholders  Ruthless focus on highest priority items
  • 14. Results  First full release in 6 months  Started using Agilebuddy after 1st sprint  No staging environment for 1st version  New production builds deployed every 2 weeks  95% unit test coverage – Rails makes it real easy  No defined QA closure phase  Very low bug count  Highly Agile architecture and codebase  Fully automated continuous integration  Fully instrumented code
  • 15. Our process – without fail Cadence!!!!  2 Week sprints  Mondays we plan  Fridays we deploy, demo’s an retrospectives Requirements, requirements  We really try hard to minimize the number of stories we throw into a sprint
  • 16. Engineering discipline Our definition of “DONE” Coded to standards Documented Unit tested – Strive for 100% code coverage Functional tested Zero defect policy Deployed to production at the end of every sprint
  • 17. TEST DRIVEN DEVELOPMENT What is it? •Not just about writing tests first •Red-Green-Refactor Cycle
  • 18. TEST DRIVEN DEVELOPMENT Red Green Refactor • Write one test and make sure it fails • Write just enough code to make it pass • Refactor the code • Repeat
  • 19. TEST DRIVEN DEVELOPMENT TDD is hard! •Discipline •Robustness •Performance •Exploratory Programming
  • 20. TEST DRIVEN DEVELOPMENT TDD is hard! ... But it’s worth it! •Actually easier and faster than manual testing •Safety net
  • 21. TEST DRIVEN DEVELOPMENT Tools are important •Autotest •Mocking/Stubbing •Continuous Integration
  • 22. TEST DRIVEN DEVELOPMENT Miscellaneous •What to test •How to get your feet wet •Don’t test what you didn’t write
  • 23. Acceptance Test Criteria Website: Blog at: