ExtremeProgramming has 3 levels.

	* Level 1: you do all the practices all the time
	* Level 2: you learn to adjust the practices to fit your project's needs
	* Level 3: you no longer care what level you are at.

See ExtremeProgrammingMaturityModel, ExtremeProgrammingCorePractices, TheyreJustRules.

These levels look approximately corresponding with ShuHaRi.