Conclusion

So, what is agile design? Agile design is a process, not an event. It's the continous application of principles, patterns, and practices to improve the structure and readability of the software. It is the dedication to keep the design of the system as simple, clean, and expressive as possible at all times.

In the chapters that follow, we'll be investigating the principles and patterns of software design. As you read, remember that an agile developer does not apply those principles and patterns to a big, up-front design. Rather, they are applied from iteration to iteration in an attempt to keep the code, and the design it embodies, clean.