NAUG NAUG Knowledge Evening – th February 2007

Agenda Welcome Warm up – Minimalist Agile –6:30 PM  6:40 PMAnurag Shrivastava Scrum and Extreme Programming –6:40 PM  7:20 PMPriyanshu Goyal Break –7:20 PM  7:30 PM Agility & the Practice of Software Architecture – 7:30 PM  8:10 PM Amit Goel Closing Remarks

Minimalist Agile 1.Frequent Delivery 2.Reflective Improvement 3.Osmotic Communication

Scrum and eXtreme Programming Priyanshu Goyal 27 th Feb 2007 NCR Agile User Group

Agenda  What is Scrum?  What is XP?  Scrum with XP NCR Agile User Group

What is Scrum?  An iterative, incremental process for developing any product or managing any work....  A "lean" approach to software development  A simple framework used to organize teams and get work done more productively with higher quality  Allows teams to choose the amount of work to be done and decide how best to do it. NCR Agile User Group

What is Scrum? Cont…  Focuses on prioritizing work based on the business value, improving the usefulness of what is delivered, and increasing revenue  Designed to adapt to changing requirements during the development process at short, regular intervals  Assumes that the software development process is complicated and unpredictable.  Easy to learn and low risk to implement NCR Agile User Group

The Zen of Scrum  Scrum is simple Small number of practices Practices are straightforward  Scrum is hard Requires involvement and common sense Requires constant inspection/adaptation to project realities  All about common sense and feels very different NCR Agile User Group

Scrum Flow Product Release Cycle (1 to 3 sprints…) NCR Agile User Group

The Framework of Scrum  Iterative, incremental framework  Each iteration driven by product needs  Team selects target functionality for increment and determines how to build it  Iterations have a fixed timebox  Each iteration produces completed product increments  Two nested cycles – Sprint and Daily NCR Agile User Group

Roles  Scrum Master Facilitator and coach  Product Owner Manages product vision and ROI  Development Team Realizes the product plans NCR Agile User Group

Practices  Daily Scrum Meeting – Daily 15 minutes, Three questions, impediments and decisions  Scrum Teams – Self organising, Cross-functional, 7+-2, committed to work, authority to do whatever required  Product backlog – List of emerging, prioritized, estimated functionality and issues  Sprint – Thirty calendar day iteration, team builds functionality that includes product backlog and sprint goals  Sprint backlog – Owned by development team, captues team implementation strategy NCR Agile User Group

Concerns  Sprint Length? – Four, two, one week or may be different each time.  Daily Standup Withdrawals – Why everyday?  Can the team really deliver without anyone keeping an eye on them? Should Scrum Master assign the work?  Why the team member do not have specialized job descriptions or roles? NCR Agile User Group

What is XP?  Founded on four core values Communication communicate with customers and fellow programmers Simplicity keep design simple and clean Feedback testing software from day one Courage respond to changing requirements and technology NCR Agile User Group

XP core practices NCR Agile User Group

XP core practices Cont…  Planning User Stories are written. Release planning creates the schedule. Make frequent small releases. The Project Velocity is measured. The project is divided into iterations. Iteration planning starts each iteration. Move people around. A stand-up meeting starts each day. Fix XP when it breaks. NCR Agile User Group

XP core practices Cont…  Designing Simplicity. Choose a system metaphor. Use CRC (Class, Responsibilities, and Collaboration ) cards for design sessions. Create spike solutions to reduce risk. No functionality is added early. Refactor whenever and wherever possible. NCR Agile User Group

XP core practices Cont…  Coding The customer is always available. Code must be written to agreed standards. Code the unit test first (TDD). All production code is pair programmed. Continuous integration. Use collective code ownership. Leave optimization till last. Sustainable Pace. NCR Agile User Group

XP core practices Cont…  Testing All code must have unit tests. All code must pass all unit tests before it can be released. When a bug is found tests are created. Acceptance tests are run often and the score is published. NCR Agile User Group

XP Programming project NCR Agile User Group

Scrum and XP  Every process can be best understood by the concerns that it is trying to address  Scrum emphasizes Management and organisation practices Scrum emerged from the product development processes and focusses on the delivery cycle  XP emphasizes Programming XP emerged from the pattern movement and addresses code quality  They are complimentary methodologies NCR Agile User Group

ScrumxP Planning Sprint Sprint Planning End of Sprint Review Daily Scrum Product Owner Scrum Master Product Backlog Sprint Backlog Simple Design Testing Test and Code Refactoring Pair Programming Collective Ownership Continuous Integration Coding Standards NCR Agile User Group

Concerns  Pair Programming – What about productivity?  How can we start implementation without the whole design/framework?  Lets do it the best way the first time.  Assign it back to him, he worked on that piece.  Testing is for the testers. NCR Agile User Group