Download - How to Get Started with Kanban, and Why
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Kanban In Software Development
Ingvald Skaug
img: http://availagility.co.uk/2008/10/28/kanban-flow-and-cadence/
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What Is Kanban?Lightweight framework for evolutionary change, step-by-step improvement
Encourages continuous flow
Not a process
Intro
What Is KanbanWhy FlowWhy Kanban
Some background: David Anderson: The Principles of the Kanban Method
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ill.: Henrik Kniberg, Kanban and Scrum - making the most of both (with Mattias Skarin)http://www.infoq.com/minibooks/kanban-scrum-minibook
What Is Kanban?
Kanban: Most adaptive tool
(Number = artifacts)
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Why Flow?Inestimable workUnplanned workUnclear workBlocked work
- need input from unavailable stakeholderParking
- unfinished work, - waiting b/c of interruptions, multi-tasking
Changed work/ requirementsLegacy codeNormative estimates
=> tech debtSpecialists
=> uncertain access
Intro
What Is KanbanWhy FlowWhy Kanban
Jørn Ola Birkeland, Bekk, at XP2010, Experience report: From a timebox tangle to a more flexible flowhttp://xp2010.org/program?sid=11&o=1
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Why Kanban?You can:Start where you areManage change, improve step by step
Expose problems on quality and processEnable higher qualityMore predictable delivery, due date performance
Sustainable developmentBalance demand against capacityIncrease trust with customersImprove productivityMore agile organization...
Seems like a tall order...
Intro
What Is KanbanWhy FlowWhy Kanban
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Everything Is Connected
Why Kanban
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Start: Visualize + WIP Limit
Why KanbanEverything Is Connected
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Simple Kanban
1. Visualize!
2. Limit WIP!
"Kanban 101" / How-to
WIP = work in progressSimple = not easy
img: http://blog.crisp.se/henrikkniberg/2009/09/15/1253019240000.htmlSome background: http://agilemanagement.net/index.php/Blog/back_to_basics_with_kanban/
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Visualize!
Use a Kanban boardReflect real workflowDashboard visible for everyoneTransparent policies
WIP limitsSpecific column names- don't use "Done"...
Kanban 101
VisualizeLimit WIP
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Why Visualize?
=> Shared mental model
=> More engaged stakeholders
=> More effective thinking, collaboration
Ex.: Kanban board, permanently visible to dev.team, management, sales...
Agile Basics
VisualizeLimit WIP
http://skaug.no/ingvald/2010/12/agile-basics-visualize-more.htmlimg from Tom Wujec's TED talk
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Limit WIP!
Start with generous limits
Better with big limits than no limits- no limits, no improvement- big limits: minimize resistance
Keep WIP limits visible on Kanban board
Kanban 101
VisualizeLimit WIP
WIP = work in progress
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Why Limit WIP?
Work in progress expires- e.g., requirements change over time
Agile Basics
VisualizeLimit WIP
WIP = work in progress
ill.: Aslak Hellesøy, Smidig 2009: Kanban for nybegynnerehttp://tcs.java.no/tcs/?id=20B8314B-4EE8-4C87-A418-2AA08F4AB3E6
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Why Limit WIP?
Reduce multi-tasking
Agile Basics
VisualizeLimit WIP
Some background, ill.: Karl Scotland: Kanban, Flow and Cadencehttp://availagility.co.uk/2008/10/28/kanban-flow-and-cadence/
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Why Limit WIP?
Expose quality and process problems- like bottlenecks
Agile Basics
VisualizeLimit WIP
WIP = work in progress
http://ingvald.posterous.com/kanban-reduce-wip-limits-to-discover-bottlene
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Q?
Simple Kanban
1. Visualize!2. Limit WIP!
Keep It SimpleBe PragmaticFlow
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Kanban vs ScrumKanban Scrum
Batching of work, feedback-loop
Works with anythingNatural fit: continuous flow
Iteration (+/- 30d),sprint backlog to demo
Tolerance for variations, distractions
Yes (with flow) - swimlanes, classes of service
No, process needs hacking (e.g., extra buffer)
Control mechanism WIP limit Commitment - stand-up (personal)- sprint: dates, features (team)
Initial change Small - low threshold Revolution - prescribed process
Eventual changes in process
Evolution - step by step improvements in "process under Kanban"
No, Scrum is a fixed process regarding its artifacts
What can improve If you keep visualizing, limiting WIP: pretty much everything
XP practices etc
Estimating/ Predictability
Works with anything.Best: use lead time after the fact as predictor, not detailed estimates
Estimating needed for burn-down
Specialists No problem Should be cross-functional teams
Some background: http://agilemanagement.net/index.php/Blog/thoughts_on_how_kanban_differs_from_scrum/http://availagility.co.uk/2009/06/15/how-is-kanban-different-from-other-approaches/http://availagility.co.uk/2010/07/27/a-pattern-for-using-scrum-and-kanban/http://blog.crisp.se/henrikkniberg/2009/12/21/1261410240000.html (Kanban and Scrum - making the most of both)
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Forward
David J Anderson: 5 core properties of a Kanban implementation1. Visualize Workflow2. Limit work-in-progress3. Measure & Manage Flow4. Make Process Policies Explicit5. Use Models to Recognize Improvement
Opportunities
"Kanban 201"
Background: David Anderson: Five Core Properties of a Kanban Implementation
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Forward
QualityTech DebtFlowClasses of ServiceSlackCadence - separate development, deliveryMetrics
"Kanban 201"
a small selection
Some more: Aspects of Kanban, by Karl Scotland, including cadence, slackDennis Stevens on SLAs in Kanban, including cost of delayClasses of Service and Policies, by David JoyceKanban and Systems Thinking, by Karl Scotland
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Become More Agile
More or less
Not either/ or
img: http://www.flickr.com/photos/42429527@N03/5063150948/
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ill.: Jørn Ola Birkeland, XP2010: From a timebox tangle to a more flexible flowhttp://xp2010.org/program?sid=11&o=1
Tech Debt vs Quality
LegacyMaintenanceUnpredictability
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Improve Quality Kanban 201
ill.: Jørn Ola Birkeland, XP2010: From a timebox tangle to a more flexible flowhttp://xp2010.org/program?sid=11&o=1
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Enable and Use Swarming, Slack
1. Can you help progress an existing kanban? Work on that.
2. Don’t have the right skills? Find bottleneck and work to release it. (SWARMING)
3. Don’t have the right skills? Do work which - won’t create any work downstream, - will improve future throughput and - can be paused as soon as existing kanban related work is available. (SLACK)
Kanban 201
http://ingvald.posterous.com/kanban-slack-creates-opportunities-for-improv
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Metrics Cumulative Flow Diagram
Sources of Error
Some work off the board
Work items vary too much in size
ill.: Henrik Kniberg & Mattias Skarin: Kanban and Scrum - making the most of bothhttp://blog.crisp.se/henrikkniberg/2009/12/21/1261410240000.html
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Resources
David Anderson: Kanbanhttp://agilemanagement.net
Henrik Kniberghttp://blog.crisp.se/henrikkniberg/Especially One day in Kanban land
Links in slides, particularly:Karl Scotland (articles)Jørn Ola Birkeland (video)
http://skaug.no/ingvald/kanban/http://twitter.com/ingvald