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Agile ppt

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  • 1. AnIntroduction toAgile SCRUM Methodology
  • 2. PresumptionsPresumptionsThe audience is well aware of traditionalsoftware development methodologies likeWaterfall Model, Iterative models, etc.
  • 3. AgendaAgenda Introduction What is Agile Methodology? What is Scrum? History of Scrum Functionality of Scrum Components of Scrum Scrum Roles The Process Scrum Artifacts Scaling Scrum Q & A Session
  • 4. IntroductionIntroductionClassical methods of software development havemany disadvantages: huge effort during the planning phase poor requirements conversion in a rapid changingenvironment treatment of staff as a factor of production New methods:Agile Software Development Methodology
  • 5. What is Agile ?What is Agile ? Agile proponents believe Current software development processes are tooheavyweight or cumbersome Too many things are done that are not directly related tosoftware product being produced Current software development is too rigid Difficulty with incomplete or changing requirements Short development cycles (Internet applications) More active customer involvement needed CMM focuses on process
  • 6. Contd…Contd… Agile methods are considered Lightweight People-based rather than Plan-based Several agile methods No single agile method XP most popular No single definition Agile Manifesto closest to a definition Set of principles Developed by Agile Alliance
  • 7. Agile ManifestoAgile ManifestoA Statement of Values Individuals and interactions over processes andtools Working software over comprehensivedocumentation Customer collaboration over contract negotiation Responding to change over following a plan http://www.agilemanifesto.org
  • 8. Agile MethodsAgile Methods Agile methods: Scrum Extreme Programming Adaptive Software Development (ASD) Dynamic System Development Method (DSDM) … Agile Alliance (www.agilealliance.org) A non-profit organization promotes agiledevelopment
  • 9. ScrumScrum
  • 10. Scrum in 100 wordsScrum in 100 wordsScrum is an agile process that allows us to focus ondelivering the highest business value in the shortesttime.It allows us to rapidly and repeatedly inspect actualworking software (every two weeks to one month).The business sets the priorities. Our teams self-manageto determine the best way to deliver the highestpriority features.Every two weeks to a month anyone can see real workingsoftware and decide to release it as is or continue toenhance for another iteration.
  • 11. History of ScrumHistory of Scrum 1995: analysis of common software development processes  not suitable for empirical,unpredictable and non-repeatable processes Design of a new method: Scrum by Jeff Sutherland & Ken Schwaber Enhancement of Scrum by Mike Beedle & combination of Scrum with ExtremeProgramming 1996:introduction of Scrum at OOPSLA conference 2001:publication “Agile Software Development with Scrum” byKen Schwaber & Mike Beedle Successful appliance of Scrum in over 50 companiesFounders are members in the Agile Alliance
  • 12. CharacteristicsCharacteristics Self-organizing teams Product progresses in a series of month-long “sprints” Requirements are captured as items in a list of“product backlog” No specific engineering practices prescribed Uses generative rules to create an agile environmentfor delivering projects One of the “agile processes”
  • 13. How Scrum Works?How Scrum Works?
  • 14. SprintsSprints Scrum projects make progress in a series of“sprints” Analogous to XP iterations Target duration is one month +/- a week or two But, a constant duration leads to a betterrhythm Product is designed, coded, and tested duringthe sprint
  • 15. Sequential vs. Overlapping Dev.Sequential vs. Overlapping Dev.Requirements Design Code Test
  • 16. No changes during the sprintNo changes during the sprintSprintInputs Tested CodeChange Plan sprint durations around how long youcan commit to keeping change out of thesprint
  • 17. Scrum FrameworkScrum Framework Roles : Product Owner, ScrumMaster, Team Ceremonies : Sprint Planning, Sprint Review,Sprint Retrospective, & Daily Scrum Meeting Artifacts : Product Backlog, Sprint Backlog,and Burndown Chart
  • 18. Product OwnerProduct Owner Define the features of the product Decide on release date and content Be responsible for the profitability of theproduct (ROI) Prioritize features according to market value Adjust features and priority every iteration, asneeded Accept or reject work results.
  • 19. The Scrum MasterThe Scrum Master Represents management to the project Responsible for enacting Scrum values and practices Removes impediments Ensure that the team is fully functional and productive Enable close cooperation across all roles andfunctions Shield the team from external interferences
  • 20. Scrum TeamScrum Team Typically 5-10 people Cross-functional QA, Programmers, UI Designers, etc. Members should be full-time May be exceptions (e.g., System Admin, etc.) Teams are self-organizing What to do if a team self-organizes someone off the team?? Ideally, no titles but rarely a possibility Membership can change only between sprints
  • 21. CeremoniesCeremonies Sprint Planning Meeting Sprint Daily Scrum Sprint Review Meeting
  • 22. Spring Planning MeetingSpring Planning MeetingSprint PlanningMeetingProduct BacklogTeam CapabilitiesBusiness ConditionsTechnologyCurrent ProductSprint BacklogProductOwnerScrumTeamManagementCustomersSprint Goal
  • 23. Parts of Sprint Planning MeetingParts of Sprint Planning Meeting 1stPart: Creating Product Backlog Determining the Sprint Goal. Participants: Product Owner, Scrum Master,Scrum Team 2ndPart: Participants: Scrum Master, Scrum Team Creating Sprint Backlog
  • 24. Pre-Project/Kickoff MeetingPre-Project/Kickoff Meeting A special form of Sprint Planning Meeting Meeting before the begin of the Project
  • 25. SprintSprint A month-long iteration, during which isincremented a product functionality NO outside influence can interfere with theScrum team during the Sprint Each Sprint begins with the Daily ScrumMeeting
  • 26. Daily ScrumDaily Scrum Parameters Daily 15-minutes Stand-up Not for problem solving Three questions:1. What did you do yesterday2. What will you do today?3. What obstacles are in your way? Chickens and pigs are invited Help avoid other unnecessary meetings Only pigs can talk
  • 27. Daily ScrumDaily Scrum Is NOT a problem solving session Is NOT a way to collect information aboutWHO is behind the schedule Is a meeting in which team members makecommitments to each other and to the ScrumMaster Is a good way for a Scrum Master to track theprogress of the Team
  • 28. Scrum FAQsScrum FAQs Why daily? “How does a project get to be a year late?” “One day at a time.” Fred Brooks, The Mythical Man-Month. Can Scrum meetings be replaced by emailed statusreports? No Entire team sees the whole picture every day Create peer pressure to do what you say you’ll do
  • 29. Sprint Review MeetingSprint Review Meeting Team presents what itaccomplished during the sprint Typically takes the form of ademo of new features orunderlying architecture Informal 2-hour prep time rule Participants Customers Management Product Owner Other engineers
  • 30. Sprint Retrospective MeetingSprint Retrospective Meeting Scrum Team only Feedback meeting Three questions Start Stop Continue Don’t skip for the first 5-6 sprints!!!
  • 31. Product BacklogProduct Backlog A list of all desired work on the project Usually a combination of story-based work (“let user search andreplace”) task-based work (“improve exceptionhandling”) List is prioritized by the Product Owner Typically a Product Manager, Marketing, InternalCustomer, etc.
  • 32. Product BacklogProduct Backlog Requirements for a system, expressed as aprioritized list of Backlog Items Is managed and owned by a Product Owner Spreadsheet (typically) Usually is created during the Sprint PlanningMeeting Can be changed and re-prioritized beforeeach PM
  • 33. Sample Product BacklogSample Product Backlog
  • 34. From Sprint Goal to Sprint BacklogFrom Sprint Goal to Sprint Backlog Scrum team takes the Sprint Goal anddecides what tasks are necessary Team self-organizes around how they’ll meetthe Sprint Goal Manager doesn’t assign tasks to individuals Managers don’t make decisions for the team Sprint Backlog is created
  • 35. Sprint Backlog during the SprintSprint Backlog during the Sprint Changes Team adds new tasks whenever they need to inorder to meet the Sprint Goal Team can remove unnecessary tasks But: Sprint Backlog can only be updated by theteam Estimates are updated whenever there’s newinformation
  • 36. Sprint BacklogSprint Backlog A subset of Product Backlog Items, whichdefine the work for a Sprint Is created ONLY by Team members Each Item has it’s own status Should be updated every day
  • 37. Sprint BacklogSprint Backlog No more than 300 tasks in the list If a task requires more than 16 hours, itshould be broken down Team can add or subtract items from the list.Product Owner is not allowed to do it
  • 38. Sample Sprint BacklogSample Sprint Backlog
  • 39. Sprint Burn down ChartSprint Burn down Chart Depicts the total Sprint Backlog hoursremaining per day Shows the estimated amount of time torelease Ideally should burn down to zero to the end ofthe Sprint Actually is not a straight line Can bump UP
  • 40. Information RadiatorInformation Radiator"Two characteristics are key to a goodinformation radiator. The first is that theinformation changes over time. This makes itworth a persons while to look at the display...The other characteristic is that it takes verylittle energy to view the display."
  • 41. Sprint Burndown ChartSprint Burndown ChartProgress752 7626646193042641801042001002003004005006007008009005/3/20025/5/20025/7/20025/9/20025/11/20025/13/20025/15/20025/17/20025/19/20025/21/20025/23/20025/25/20025/27/20025/29/20025/31/2002DateRemainingEffortinHours
  • 42. Release Burndown ChartRelease Burndown Chart Will the release be done on right time? X-axis: sprints Y-axis: amount of hours remaining The estimated work remaining can also burnup
  • 43. Product Burndown ChartProduct Burndown Chart Is a “big picture” view of project’s progress (allthe releases)
  • 44. Scalability of ScrumScalability of Scrum A typical Scrum team is 6-10 people Jeff Sutherland - up to over 800 people "Scrum of Scrums" or what called "Meta-Scrum“ Frequency of meetings is based on thedegree of coupling between packets
  • 45. Scalability of ScrumScalability of Scrum
  • 46. Scalability of ScrumScalability of Scrum
  • 47. Pros/ConsPros/Cons Advantages Completely developed andtested features in shortiterations Simplicity of the process Clearly defined rules Increasing productivity Self-organizing each team member carriesa lot of responsibility Improved communication Combination with ExtremeProgramming Drawbacks “Undisciplined hacking”(no writtendocumentation) Violation ofresponsibility Current mainly carriedby the inventors
  • 48. Thank You !!!