XP can accommodate the common forms of contract, albeit with slight modifications. Fixed price/fixed scope contracts, in particular, become fixed price/fixed date/roughly fixed scope contracts when run with the Planning Game.
How can you fit XP to common business practices? The wrong form of contract can easily break a project, regardless of tools, technology, and talent.
This chapter examines some business arrangements for software development and how you might use them with XP.
Folks seem to have the most trouble with running a fixed price contract extreme. How can you do a fixed price/fixed date/fixed scope contract if you play the Planning Game? You will end up with a fixed price/fixed date/roughly variable ...