Team Size
■ Assume teams with 4 to 10 programmers (5 to 20 total team members)
■ For new teams, four to six programmers is a good starting point
■ 6 programmers produces a team that also includes 4 customers, 1 tester, and a project manager, for a total team size of 12 people
■ 12 people turns out to be a natural limit for team collaboration
■ XP teams can be as small as one experienced programmer and one product manager
■ The smallest team with full XP consists of five people: four programmers (one acting as coach)and one product manager (who also acts as project manager, domain expert, and tester)
■ Starting with 10 programmers produces a 20-person team that includes 6 customers, 3 testers, and a projectmanager.
• You can create even larger XP teams, but they require special practices