12 XP Practices
S mall releases - By the end of each iteration( 2 to 3 weeks long) the team is responsible for delivering working, tested code that can immediately be put to use. The p lanning game - Prior to the start of each iteration, the team and customer plan the iteration. This involves selecting the highest priority stories that can be completed in the iteration and then identifying the specific tasks necessary to complete the story . R efactoring - Refactoring (Fowler 1999; Wake 2003) refers to the restructuring or rewriting of code so as to improve the code without changing its external behavior.Refactoring is one of technique used by XP to replace upfront design. T esting - XP puts the tests right up front in a practice called test-driven development (Beck 2003; Astels 2003). On an XP project the developers write automated unit tests and the customers write acceptance tests, which are often automated either by the customers themselves or with some help from the devel