2012 regina TC 102 kanban

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2012 regina TC 102 kanban

  1. 1. AMIR BARYLKO KANBANAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  2. 2. INTRO Kanban System Pull vs Push Goals Software Process ExampleAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  3. 3. KANBAN SYSTEM •Kanban = Signal Card •Kanban cards represent the capacity of the system •Each card is a “signal” •No work can be started unless has a card available •The card gets attached to a work itemAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  4. 4. PULL VS PUSH New work is New work is pulled pushed into the system into the system based on based on capacity demandAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  5. 5. GOALS • Improve your current process • Not change roles • Not change flow • Easy adoptionAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  6. 6. SOFTWARE PROCESS • Cards are “virtual” • Cards represent a work item • The system is represented by a card “wall” • Pull is signaled when the work-in-progress is less than the actual limit • Often implemented with sticky notes and a boardAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  7. 7. KANBAN BOARDAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  8. 8. MODEL YOUR PROCESS Identify Workflow Drawing the board Time Calculation Buffers Work ItemsAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  9. 9. IDENTIFY WORKFLOW •Which states/phases can be possible? •What are the transitions? •Which roles are involved? •Which are the boundaries?Amir Barylko > Kanban > Implementation MavenThought Inc.
  10. 10. EXAMPLE Analysis Testing Design UAT Coding DeployAmir Barylko > Kanban > Implementation MavenThought Inc.
  11. 11. WORK ITEMS • Use Cases • User stories • Bugs • Change request • Etc....Amir Barylko > Kanban > Implementation MavenThought Inc.
  12. 12. BOARD / CARD WALL • Each phase/state becomes a column • Has a first input column (usually called backlog) • May have a last archive form done items • The flow goes from left to right • By convention highest priority goes on topAmir Barylko > Kanban > Implementation MavenThought Inc.
  13. 13. EXAMPLE BOARD Input Analysis Design Coding Testing UAT Deploy FlowAmir Barylko > Kanban > Implementation MavenThought Inc.
  14. 14. LEAD TIME • Starts when the card is added to the input queue and finishes when is delivered/deployed Input Analysis Design Coding Testing UAT Deploy Lead TimeAmir Barylko > Kanban > Implementation MavenThought Inc.
  15. 15. CYCLE TIME • Startswhen work begins on the card and finishes when the card is ready to be deployed Input Analysis Design Coding Testing UAT Deploy Cycle TimeAmir Barylko > Kanban > Implementation MavenThought Inc.
  16. 16. WORK ITEMS • Do all the work items have the same workflow? • How can we identify them? • Use different colors • Or different rows (swim lanes) • Or bothAmir Barylko > Kanban > Implementation MavenThought Inc.
  17. 17. USING SWIM LANES Backlog Analysis Coding UAT Archive In Prog. Done In Prog. Done Features Bugs Small ChangeAmir Barylko > Kanban > Implementation MavenThought Inc.
  18. 18. WHAT GOES IN THE CARD? • Information about the feature/request • Number for traceability (tracking system, etc) • Who’s assigned • Deadline • Other?Amir Barylko > Kanban > Implementation MavenThought Inc.
  19. 19. Post-It DRAW YOUR BOARD & Sharpie! • Split up in teams (2 or 3) • Identify current workflow • Identify work items • Draw a board • DiscussAmir Barylko > Kanban > Implementation MavenThought Inc.
  20. 20. WIP LIMITS Limit Work Queues & Buffers Considerations WIP Accuracy Capacity AllocationAmir Barylko > Kanban > What’s Kanban? MavenThought Inc.
  21. 21. LIMIT WORK • How many team members? • How many roles? • How many work items per person? • Usually one item per person is enough • but it depends on your environmentAmir Barylko > Kanban > Implementation MavenThought Inc.
  22. 22. EXAMPLE I •3 Developers •Analysis (2) •2 Testers •Dev (3) •2 Analysts •Testing (2) •1 Sysadmin •Deploy (1) 8 TotalAmir Barylko > Kanban > Implementation MavenThought Inc.
  23. 23. EXAMPLE II •3 Developers •Analysis (4) •2 Testers •Dev (4) •2 Analysts •Testing (3) •1 Sysadmin •Deploy (2) 13 TotalAmir Barylko > Kanban > Implementation MavenThought Inc.
  24. 24. QUEUES • What happens we one phase is faster? • Work would be “waiting” to be pulled • So its “queuing” for the next phase • What should be the size of the queue?Amir Barylko > Kanban > Implementation MavenThought Inc.
  25. 25. QUEUE EXAMPLE Dev 20 Backlog Analysis Coding UAT Deploy Ready (7) (4) (4) (2) (2) Total (3) In Prog. Done In Prog. Done Bottleneck bufferAmir Barylko > Kanban > Implementation MavenThought Inc.
  26. 26. CONSIDERATIONS • Buffers mitigate bottlenecks allowing work to continue • However letting in more work doesn’t imply we go faster • Our goal is to balance the demand and throughput • We want to make “Lead Time” shorterAmir Barylko > Kanban > Implementation MavenThought Inc.
  27. 27. RIGHT THE FIRST TIME • What would happen if the WIP limits are not accurate? • Absolutely nothing! • It’s an empirical process • Don’t get caught on getting it right the first timeAmir Barylko > Kanban > Implementation MavenThought Inc.
  28. 28. HOWEVER... Always set the WIP!Amir Barylko > Kanban > Implementation MavenThought Inc.

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