Mr willian zhou,thank you very much for your answer. the sentence you send me "the coefficient can approach 1.0 if you have many highly correlated items " means the value of alpha less than 1.0. the coefficient of anything can't over 100%. the second method still not the range of 0 to 1.0. SO, I can't understand it until now.
anyway,thangks for your help!thanks!
多谢William老师!
我还有这样一个问题:
在JMP里,测量 系统分析的G R&R 和EMP 方法以,在什么情况下优先用G R&R analysis> quality and process >variability/attribute guage chart ,,在什么情况下优先用 EMP analysis>quality and process >measurement system analysis?