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Agile methodologies

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  • 1. Agile Methodologies Allan Spartacus Mangune
  • 2. Delivery Time • Lectures – 3 hours • 2 case studies – 20 minutes each
  • 3. Agenda Iterative Development Agile Manifesto Extreme Programming Scrum Case Studies
  • 4. Iterative Development Requirements Analysis & Design Testing Deployment Planning Repeated cycle of small portions of the software development
  • 5. Phases Inception • Identify details of functional and non-functional requirements and risks enough to get started Elaboration • Produces a system based on desired architecture that addresses high risks • Non-functional requirements are almost fulfilled Construction • Incrementally produce the functional requirements • Analysis, design, code, and testing Transition • Delivers the software product to production
  • 6. Agile Manifesto Individuals and Interactions over Processes and Tools Working Software over Comprehensive Documentation Customer Collaboration over Contract Negotiation Responding to Change over Following a Plan
  • 7. Individuals and Interactions Allocate enough time for people to think, focus and execute their work Allow people to collaborate with each other Always begin with people then identify the tools they need • Emphasis on tools and processes is secondary
  • 8. Working Software Develop potentially shippable increment of product • Use short iterations Demo the product increment for acceptance • Customers will notice the evolving product increment Generate the least amount of document • Regulatory requirements may prompt you to document more
  • 9. Customer Collaboration Contacts must have a flexibility for change • Accommodate Agile process Changing requirements may happen • Built-in change control should accommodate changes For fixed-priced contract, accommodate request during the sprint or release planning • Subject to customer’s approval
  • 10. Responding to Change Emphasizes on quick response on changes Does not devalue planning Plan should be flexible enough to accommodate changes
  • 11. Extreme Programming Created by Kent Beck Agile software development principle Short iterations Software development activities Values
  • 12. Agile Software Development Principle Software quality • Organize people to deliver high quality software Increased productivity • Delivers only the functionalities needed Reduced cost of requirement changes • Changes are allowed to keep the desired features
  • 13. Short Iterations Software product is developed in a series of short iterations Customer provides early feedback Development team gets better understanding of the product being developed
  • 14. Software Development Activities Coding • Working code is the only important product of software development Testing • Obsessive testing – Unit testing, acceptance testing, continuous integration testing Listening • Understand what the customer wants Designing • Good design avoids dependencies that break other parts of the system
  • 15. Values Communication • Collaboration of users and programmers through frequent communication and feedback Simplicity • Simple design and coding improves the quality of software, and of course communication Feedback • Feedback from tests and customers Courage • Code for today. Refactor your code. Throw away obsolete code. Respect • Respect the team’s commitment. Avoid breaking the build.
  • 16. SCRUM Incremental Iterative Product development framework Development team works to achieve its goal
  • 17. Roles Product Owner Development Team Scrum Master
  • 18. Product Owner Represents the customers/stakeholders Drives the development effort. • Ensures that the development team delivers value to the business Owns the user stories in the Product Backlog list Accepts or rejects the whole or part of the product increment delivered by the development team
  • 19. Development Team Composed of 3-9 individuals with cross-functional skills Self-organizing Uses all the necessary resources to finish the product increment
  • 20. Scrum Master A servant-leader who facilitates the Scrum • Not a traditional project manager Enforces the rules or Scrum Removes the impediments • Makes the impediments visible to everyone
  • 21. Sprint Time boxed effort to build the product increment Duration is between one and four weeks • Typical is two weeks Source: http://en.wikipedia.org/wiki/File:Scrum_process.svg
  • 22. Scrum Events Sprint Planning Meeting Daily Scrum Meeting Demo Meeting Retrospective Meeting
  • 23. Sprint Planning Meeting Held before the Sprint starts Product Owner presents the ordered User Stories Development Team selects User Stories • Team’s capacity is considered Development Team develops the Sprint Backlog list
  • 24. Daily Scrum Meeting Held daily and time boxed to minutes Development team members participate Everyone reports to the team • Work done since the last meting • Impediments • Planned work for the day
  • 25. Product Demo Meeting Time boxed to 4 hours Demonstrate the potentially shippable product increment to the stakeholders Work that is not 100% done is not included in the demo Product owner accepts or rejects any of the functionalities presented
  • 26. Sprint Retrospective Meeting Time boxed to 3 hours Facilitated by Scrum Master Development teams talks about what went well and wrong List of actionable items is prepared • Objective is to improve the current process/situation
  • 27. References Iterative Development - http://en.wikipedia.org/wiki/Iterative_development Agile Manifesto - http://en.wikipedia.org/wiki/Agile_Manifesto#The_Agile_Manifesto http://thinkrelevance.com/how-we-work/agile_principles Extreme Programming - http://en.wikipedia.org/wiki/Extreme_programming Scrum - http://en.wikipedia.org/wiki/Scrum_(software_development)
  • 28. Copyright (C) 2014. Allan Spartacus Mangune This work is licensed under a Creative Commons Attribution- NonCommercial-ShareAlike 4.0 International License. License URL: http://creativecommons.org/licenses/by-nc- sa/4.0/