System Metaphor

System Metaphor

A metaphor that everyone (whole team, customers, management, stakeholders) agrees on for how the system works.
Simple Design

Simple Design

Kent Beck created four rules of Simple Design. These are sometimes referred to as The Four Commandments or the XP Simplicity Rules. The rules, in priority order, are that code should: Pass all tests Express the author’s ideas Avoid duplication … Continued
Collective Code Ownership

Collective Code Ownership

Collective code ownership breaks down fiefdoms within an application’s codebase. Nobody “owns” a particular part of the code. Everyone on the team is responsible for all of the code.  This enables pair programming and refactoring by the whole team. It … Continued
Small Releases

Small Releases

Frequent, small releases help ensure constant communication and tight feedback loops.
Continuous Integration

Continuous Integration

Continuous Integration is an XP practice that ensures problems with the full system are detected as soon after they are introduced as possible. It refers to automatically building and testing the full system (integrating the system with all of its … Continued
Test Driven Development

Test Driven Development

Test Driven Development, or TDD, also known as Test Driven Design, is a process for writing code using tests to define and then confirm the software’s behavior. It is characterized by a set of steps known as “Red – Green – … Continued
Pair Programming

Pair Programming

Pair Programming refers to the practice of having two people engaged together on a single programming task.  It’s an XP practice, and is employed by many agile (and non-agile) software development teams.  Even in traditional environments where pair programmnig is … Continued