비정규 공정의 공정능력지수에 관한 고찰

Abstract

In this paper, We consider some generalization of these five basic indices to cover non-normal distribution. The proposed generalizations are compared with the five basic indices. The results show that the proposed generalizations are more accurate than those basic indices and other generalization in measuring process capability. We compared an estimation methods by Clements with based on sample percentiles to calculate the proposed generalization as an example. The results indicated that Clements method is more accurate than percentile method, in measuring process capability. But the calculations of percentile method are easy to understand, straightforward to apply, and show be valuable used for applications.