Artifact: Production Code
The executable specification of the system being built.

In XP, we consider Production Code to be the most important artifact. It is the one design artifact that cannot be replaced because it is the only complete and unambiguous expression of design intent. Source code is a specification. It, along with a compiler or interpreter, encompasses all of the semantics necessary to produce a running process on a computer.

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Main Description

This definition of Production Code encompasses hand-coded software as well as executable models. The Production Code must be kept clean and simple, as it is the main vehicle for communicating design intent to the programming team. The code has comprehensive customer and unit tests. The XP practices of simple design, pair programming, refactoring, collective code ownership, test driven development, and coding standard support the creation of the code.

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