Extreme Programming (XP)

Extreme Programming (XP) is a software development methodology that emphasizes rapid delivery, frequent releases, and continuous improvement. XP was first introduced by Kent Beck in the late 1990s and has since become one of the most popular Agile methodologies.

XP is based on 12 core practices, which are grouped into four categories: Planning, Design, Coding, and Testing.

1. Planning: XP teams use a simple, flexible planning process that involves breaking the work into small, manageable chunks called "user stories."
2. Design: XP teams use a simple design process that emphasizes simplicity, flexibility, and maintainability.
3. Coding: XP teams use a set of coding practices, such as pair programming and test-driven development, to ensure that the code is of high quality and easy to maintain.
4. Testing: XP teams use a set of testing practices, such as automated testing and continuous integration, to ensure that the code is free of bugs and meets the customer's requirements.

The goal of XP is to deliver high-quality software quickly and efficiently by involving the customer throughout the development process and continuously improving the process through retrospectives.