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Agile Software Development with XP
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Agile Software Development with XP

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The Object Oriented Technology course assignment from CU.

The Object Oriented Technology course assignment from CU.

Published in: Technology, Business

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  • Transcript

    • 1. BY Extreme Programming
    • 2.
      • The problem in today Software Development
      • Agile Methods
      • eXtreme Programming (XP)
      • Q&A
    • 3.
      • Risks:
        • Schedule Slips
        • Quality of product (Defect Rate)
        • Requirement Changes
        • Project Cancelled
    • 4.  
    • 5.  
    • 6.  
    • 7.  
    • 8. Customer satisfaction by rapid, continuous delivery of useful software
    • 9. Working software is delivered frequently
    • 10. Working software is the principal measure of progress
    • 11. Even late changes in requirements are welcomed
    • 12. Close, daily cooperation between business people and developers
    • 13. Face-to-face conversation is the best form of communication
    • 14. Projects are built around motivated individuals, who should be trusted
    • 15. Continuous attention to technical excellence and good design
    • 16. Simplicity
    • 17. Self - organizing teams
    • 18. Regular adaptation to changing circumstances
    • 19.
      • Agile UP
      • XP (eXtreme Programming)
      • FDD (Feature Driven Development)
      • Scrum
    • 20. >>
    • 21.  
    • 22.  
    • 23. An attempt to reconcile humanity and productivity
    • 24. A mechanism for social change
    • 25. A path to improvement
    • 26. A style of development
    • 27. A software development discipline
    • 28.  
    • 29. Communication
    • 30. Simplicity
    • 31. Feedback
    • 32. Courage
    • 33. Respect
    • 34.  
    • 35.
      • Planning game
      • Frequent releases
      • Metaphor
      • Simple Design
      • Testing
      • Refactoring
      • Pair Programming
      • Collective Ownership
      • Continuous Integration
      • 40 Hour Week
      • On-site customer
      • Coding Standards
    • 36.
      • A release cycle is usually up to 3 months
      • Each iterations is around to 3 weeks
      • Each iteration the selected user stories are implemented
      • Each user story is split in programming tasks of 1-3 days
      • small and frequent releases provide frequent feedback from the customer.
    • 37.
      • Do the simplest thing that could possible work
      • You aren’t going to need it
        • do not spend time implementing potential future functionality (requirements will change)
      • Put in what you need when you need it
      • Simple design ensures that there is less
        • to communicate
        • to test
        • to refactor
    • 38.
      • Tests play the most important and central role in XP
      • Tests are written before the code is developed
      • All tests are automated (test suites, testing framework)
      • User stories = Requirements
      • Tests = System Specification
      • 2 kinds of test:
        • Acceptance tests (functional tests)
          • clients provide test cases for their stories
          • developers transform these in automatic tests
        • Unit tests
          • developers write tests for their classes (before implementing the classes)
          • All unit tests must run 100% successfully all the time
    • 39.
      • Process of improving code while preserving its function
      • The aim of refactoring is to
        • make the design simpler
        • make the code more understandable
        • improve the tolerance of code to change
      • The code should not need any comments
        • There is no documentation in XP
        • The code and the user stories are the only documents
      • Refactoring is continuous design
    • 40.
      • Two programmers sit together in front of a workstation
        • one enters code
        • one reviews the code and thinks
      • Second most important practice after tests
      • Costs 10-15% more than stand-alone programming
      • Code is simpler (fewer LOC) with less defects (15%)
      • Ensures continuous code inspection (SE)
    • 41.
      • Daily integration at least
      • The whole system is built (integrated) every couple of hours
      • XP feedback cycle:
        • develop unit test
        • code
        • integrate
        • run all units tests (100%)
        • release
      • A working tested system is always available
    • 42.  
    • 43.
      • Traditional Software Lifecycle:
        • Listen - Design - Code - Test
      • XP lifecycle
        • Listen - Test - Code - Design
      • Listen to customers while gathering requirements
      • Develop test cases (functional tests and unit tests)
      • Code the objects
      • Design (refactor) as more objects are added to the system
    • 44. Listen to customers while gathering requirements
    • 45. Develop test cases (functional tests and unit tests)
    • 46.  
    • 47. Design (refactor) as more objects are added to the system
    • 48.  
    • 49.