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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 2
Deep Agile Blending Scrum and Extreme Programming Jeff Sutherland - - PowerPoint PPT Presentation
Deep Agile Blending Scrum and Extreme Programming Jeff Sutherland - - PowerPoint PPT Presentation
Deep Agile Blending Scrum and Extreme Programming Jeff Sutherland Ron Jeffries Separation of XP and Scrum Methods * Largely Historical * XP chose to write more down * XP programmer focus * Successful Scrum Teams use XP-like Practices
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 3
Need for “Technical” Practices
* Interative Planning and Delivery * Feature Focus
*
* Incremental Design * Frequent Testing
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 4
XP Practices not Purely Technical
* User Stories * Cards * Informative Workspace
* Big Visible Charts * Tracking Boards
* Planning Game * Small Releases * … etc
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 5
Developer Focus
* Low in Scrum
* (discovery)
* Higher in XP
* (starting point)
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 6
XP’s Project Management Practices
* Compatible with / Analogous to Scrum * Small Releases * Whole Team * Planning Game
* Iteration Planning * Release Planning
* …
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XP Practices
* What are they? * Their role in Scrum … or any project.
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XP Practice
* Simple Design * Must proceed incrementally * Must deliver features right away
*
* Begin with a simple design
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XP Practice
* Pair Programming * Design is changing … * How do we know what it is?
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XP Practice
* Test-Driven Development * System must work all the time;
* Must ship every week or two;
* How do we know it isn’t broken? * Test it!
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 11
XP Practice
* Refactoring * Simple Design cannot last!
* Are we doomed???
* Design must improve …
* Refactoring is the technique
* (Refactoring: Martin Fowler)
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 12
XP Practice
* Continuous Integration * We’ll be integrating at least every two weeks; * Integration is always hell; * Get good at it!
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XP Practice
* Shared Code * “Any pair can improve any code at any time”
* -- Kent Beck
* Faster progress * More eyes * Higher Quality
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XP Practice
* Coding Standard * All eyes on all code * Make it look alike * Don’t go crazy – just make it look alike
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XP Practice
* Whole Team * All the people you need * When you need them * Technical Resources * Business Resources
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XP Practice
* User Stories * Card * Conversation * Confirmation
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XP Practice
* Automated Customer Tests * How often do you need to test this? * How often do you want to test it by hand anyway???
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XP Practice
* Informative Workspace * Tracking Boards * Big Visible Charts
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XP Practice
* Energized Work * Work vigorously * Rest effectively * Be done at the end of every day!
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XP Practice
* Sustainable Pace * If you go too fast, you’ll go off the road! * Do not push for more stories!!
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XP Practice
* Slack * Have items on the list that can be dropped * You can always ask for more * Something will come up
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XP Practice
* Weekly Cycle
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XP Practice
* Quarterly Cycle
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XP Practice
* Code and Tests * These are the only documents that count * Generate the rest!
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XP Practice
* Team Continuity * Software is a work of the mind * Why throw that away?
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XP Practice
* Single Code Base * Anything else is waste! * Learn to do it right * Generate old versions if you must – Don’t save them
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XP Practice
* Daily Deployment * Go home clean! * Deliver value instantly!
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XP Practice
* Incremental Design * (Discussed – Refactoring)
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XP Practice
* Sit Together * And talk with each other! * Would you rather have a hug from your Mom, or a nice note?
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XP Practice
* Ten Minute Build * Yes, we really mean it
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XP Practice
* Real Customer Involvement * Don’t guess – find out. * Set their expectations * Help them learn too
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XP Practice
* Incremental Deployment
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XP Practice
* Shrinking Teams * As need declines … * People move on
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XP Practice
* Root Cause Analysis * “Ask Why Five Times”
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XP Practice
* … and many many more … * The richness of software development … * And of how to do it … * Cannot be plumbed by any list!
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Forces and Responses
* These practices are not random, * Nor are they mandatory * But they are needed * And there are reasons why
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Forces and Responses
* Teamwork
* Team Room
* 2X Productivity!!
* Don’t Specialize * Don’t Hand Off * Pair Programming * Shared Code
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 38
Forces and Responses
* Business Value
* Small Stories * Avoid Tasks * Automated Customer Acceptance Tests
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Automated Customer Acceptance Tests
* Communcation * Learning * Confidence * Repetition!
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Forces and Responses
* Continuous Delivery
* Grow the Design
* Refactoring
* Continuous Integration * Ten Minute Build * Shared Code * Energized Work
* Sustainable Pace
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April 28-29, 2007 Deep Agile -- XP and Scrum Ron - 41
Forces and Responses
* Predictability
* Get Done = Done
* Tests
* Test-Driven Development
* Stories vs Tasks
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