process when it breaks. I don't say if because I
already know you will need to make some changes for your specific
project. Follow the XP
to start with, but do not hesitate to change what doesn't work. This
doesn't mean the team can do whatever they want. The rules must be
followed until the team has changed them. All of your developers must
know exactly what to expect from each other, having a set of rules is
the only way to set these expectations.
retrospective meetings to talk about what is working and what is not
and devise ways to improve XP. Make improving your process a normal
part of your development.