1. Introduction to XP

2. What is XP? eXtreme Programming
“XP is a lightweight methodology for small to medium sized teams developing software in face of vague and changing requirements.” – Kent Beck
XP is a specific (one of many) methodology of a set of methodologies referred to as “agile.”

3. Agile Manifesto
We are uncovering better ways of developing software by doing it and helping others do it. Through this work we have come to value: Individuals and interactions over processes and tools Working software over comprehensive documentation Customer collaboration over contract negotiation Responding to change over following a plan That is, while there is value in the items on the right, we value the items on the left more.

4. XP Values Why values? The 4 values:
Methodologies impose certain ways of doing things.
The reason for doing something should be valued.
The 4 values:
Communication
Simplicity
Feedback
Courage

5. XP Values Communication Simplicity Feedback Courage
XP makes a bet: “better to do a simple thing today and pay a little more tomorrow to change it if it needs to be, than to do a complicated thing today that may never be used anyway.” (YAGNI)
Feedback
Courage

6. XP Practices Pair Programming (unit)Tests first Planning Game
Small Releases
Metaphor
Simple Design
Sustainable Pace
Collective Ownership
Continuous Integration
Coding Standards
On-Site Customer
Refactoring
The practices support and reinforce each other.

7. XP Values and Practices
Practices bring accountability to the Values
Values give purpose to the Practices -- Kent Beck (XP/AU 2003)
accountability
Values
Practices
purpose

8. XP Values and Practices (Lowell Lindstrom XPAU03)
D E L I V E R
Communication
Simplicity
Courage
Feedback

9. XP Values and Practices (Lowell Lindstrom XPAU03)
D E L I V E R
Communication
Simplicity
Whole Team
Acceptance Tests
Planning Game
Small Releases
Courage
Feedback

10. XP Values and Practices (Lowell Lindstrom XPAU03)
D E L I V E R
Communication
Simplicity
Whole Team
Test Driven Development
Acceptance Tests
Planning Game
Pair Programming
Refactoring
Simple Design
Small Releases
Courage
Feedback

11. XP Values and Practices (Lowell Lindstrom XPAU03)
D E L I V E R
Communication
Simplicity
Whole Team
Retrospectives
Coding Standards
Collective Ownership
Test Driven Development
Acceptance Tests
Planning Game
Pair Programming
Refactoring
Continuous Integration
Simple Design
Sustainable Pace
Metaphor
Small Releases
Courage
Feedback

12. Activities and Variables
Development Activities
Coding
Testing
Designing
Listening
Project Variables
Time
Cost
Quality
Scope

13. XP Metaphor Controlling software development is like driving a car.
We need to make many small adjustments, not a few large adjustments
We need feedback to know if we are a little off