测试阶段解释

SAT = site acceptance test，现场验收测试

FAT = Factory acceptance test，工厂验收测试

UAT = User acceptance test，用户验收测试

USR = User system requirement，用户系统要求

参考：

http://blog.csdn.net/u012161134/article/details/53174349

http://www.sqaforums.com/showflat.php?Number=440210

http://www.plctalk.net/qanda/showthread.php?t=26626