Design of X-Bar Control Chart Using Multiple Dependent State Sampling under Indeterminacy Environment

Abstract

An X-bar control chart using the multiple dependent state (MDS) sampling under indeterminacy is presented in this paper. The MDS sampling utilizes the previous subgroup information if in-decision on the first sample. The use of MDS increases the power of the Shewhart control chart to detect a very small shift in the process. The advantages of the proposed chart over the past charts are given by simulation and real examples.