This article arises node grouping diagnosis based on Chwa&Hakimi fault model and defines absolute fault sets and finally diagnosis chart, on which all the consistent fault patterns (CFP) can be found.

By defining the Group s testing edge and the absolute fault sets, the Group diagnosis chart is simplified ,so all the CFP of PMC model based on ex-test can be easily found even if the condition of the t-diagnosable isn t satisfied.

Several operating characteristic (OC) functions and the according algorithm for single and double sampling inspection by attributes based on the grouping method are provided in this paper.

By applying the theory of probability to the collective inspection of mature egg pebrine, we have reported the relationship between the number of pebrine eggs and that of pebrine collectivity.