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Xanpan - what do you get if you cross XP and Kanban?
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Xanpan - what do you get if you cross XP and Kanban?

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Xanpan - principles and practices from adding Kanban and flow to XP

Xanpan - principles and practices from adding Kanban and flow to XP

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  • 1. allan kelly Twitter: @allankellynet http://www.allankelly.net Xanpan “Zan-pan” The Cigarettes & Colas talk What do you get if you cross Kanban with Extreme Programming? Skills Matter In the Brain September 2013
  • 2. Allan Kelly • Business Analysis and Leadership, Pullan & Archer 2013 • 97 Things Every Programmer Should Know, Henney, 2010 • Context Encapsulation in Pattern Languages of Program Design, vol#5, 2006  Consulting on software development & strategy  Training for Agile Author – Changing Software Development: Learning to be Agile (2008, Wiley) – Business Patterns for Software Developers (2012, Wiley - ISBN: 978-1119999249) – Xanpan: Reflections on agile (work in progress) https://leanpub.com/xanpan
  • 3. We don’t need another Methodology
  • 4. Choose your Cola Kent Beck XP-Cola Ken & Jeff’s Scrum-Cola David Anderson Kanban-Cola Allan Kelly Xanpan-Cola
  • 5. Where did Xanpan come from? • Experience (Lean+XP) – Blue-White-Red • Kanban • XP • Plus – Seeing others – Reports of other cross-overs • Making sense of what I see XP Kanban & Lean 1 First concept XP Kanban & Lean Product Management 2 XP & Scrum Kanban & Lean Product M anagem ent O therstuff 3
  • 6. Principles • Iteration routine • Team Centric – Planned & Unplanned work – #NoProjects • Invest in Quality / “Quality is Free” • Dis-economies of Scale • Flow: Emphasize, Level, Span, Constrain • Goodhart’s Law • Constructivism learning • Visualise
  • 7. Practice 1. XP Technical practices: TDD, CI, etc. 2. Teams can work on more than 1 stream – Flow multiple projects/product to 1 team 3. Break Stories to Tasks – Colour code work – Estimate in Points – Small is better - Think Small! 4. Benchmark against self – Velocity, #NoCommitment
  • 8. Practices 5. Flow – Use Product “Ownership” (Product Management & Business Analysis) to restrict flow – Apply WIP limits – Absolute Prioritization 6. Planning levels (horizons) 7. Pick’n’Mix 8. Action over words
  • 9. Practices 9. Fit work to the time – Deadlines are good – Limit WIP 10.Evolutionary change – Small Bangs are OK – but Big Bangs are bad
  • 10. Some detail….
  • 11. Iterations & Flow • Iterations bring structure But • Strict iterations break flow – “Story must be finished in sprint” – “Story cannot be bigger than a sprint” – Sprint tail overwhelmed by finished stories – Testers drop standards • Strict iteration – Difficult at first – learn to think small
  • 12. Iterations & Flow • Stories spanning sprints levels work – Break down stories to tasks – Tasks only counted when completed – When all tasks done, Story done • 3 Strikes and you are out! – Story span 1 Sprint, OK, good – Story spans 2 Sprints, umm… Red Flag – Story spans 3 Sprints, Out! Story too big
  • 13. Breakdown • In planning meeting • Part – Software Design – Requirements elicitation – Opportunity to reduce scope – Estimation exercise Image from Paul Goyette, Creative Commons License http://commons.wikimedia.org/wiki/File:Wrecking_ball.jpg
  • 14. Epic StoryStoryStoryStory Discouraged but accepted Blues – Stories • Business facing • Have automatic business value • Deliverable in own right • Deliverable sometime soon • Typically software feature but anything which brings value – documentation, etc. TaskTaskTaskTask Whites – Tasks • Typically developer tasks • No business value alone
  • 15. Yes, Estimation I’ve come to like Planning Poker but choose your own poison • Estimate White tasks in planning meeting – Ball-park estimate Blues • Estimates in Points – Your currency £ $ € – One currency – Forget hours
  • 16. Estimation worthwhile? “I can bring a project in to the day”• For scheduling? Perhaps – Some teams report good results – Some teams placebo effect – Long run average accurate enough • Provides Developers with safety valve • Useful input to design process (Forget actuals – retrospective estimates)
  • 17. Reds Yellows Unplanned work Green Specific to you
  • 18. Planned & Unplanned work • Work planned in planning meeting • Unplanned work allowed at any time – Tag it, e.g. Yellow card – Retrospective estimation • At end of the iteration count points unplanned – Graph/Track planned v. unplanned – Incorporate into planning velocity
  • 19. Light Sabre Every team must design their own board
  • 20. Goodhart’s Law And so do other measurements Any observed statistical regularity will tend to collapse once pressure is placed upon it for control purposes. Professor Charles Goodhart, CBE, FBA Velocity & points break down if abused
  • 21. Is Xanpan useful? • Maybe – Take it – Use it • Inspiration – Roll your own Image from Ildar Sagdejev under Creative Commons license http://commons.wikimedia.org/wiki/File:2009-02-15_Rolling_a_cigarette.jpg
  • 22. WIP – Work in Progress http://leanpub.com/xanpan Comments please!
  • 23. allan kelly www.softwarestrategy.co.uk www.allankelly.net allan@allankelly.net Twitter: @allankellynet (c) Allan Kelly http://www.softwarestrategy.co.uk 25 http://leanpub.com/xanpan Which brand of Cola are you drinking?