2x4 Pair programming rotation schedule insures that a team of developers pairs with everyone often, and avoids the knowledge silos and feature ownership traps encountered by most teams. Read my full blog post at http://40withegg.com/articles/2x4-pair-programming-rotation
I think it's only necessary to rotate that often when you have a set of constantly changing requirements and a short release cycle. Otherwise it can be a bit frustrating to constantly rotate every 2 days, then again XP programming is most effective when you have a small team of developers.
xitongzou 11 months ago