Extreme program

XP is set up for small groups of programmers. Between 2 and 12, though larger projects of 30 have reported success. Your programmers can be ordinary, you don't need programmers with a Ph.D. to use XP. But you can not use XP on a project with a huge staff. We should note that on projects with dynamic requirements or high risk you may find that a small team of XP programmers will be more effective than a large team anyway.
XP