Mean estimate for Shewhart-chart-monitored processes subject to random shifts
Resource
Systems, Man, and Cybernetics, 1998. 1998 IEEE International Conference on
Journal
1998 IEEE International Conference on Systems, Man, and Cybernetics
Pages
-
Date Issued
1998-10
Date
1998-10
Author(s)
Elsayed, E.A.
DOI
N/A
Abstract
The Shewhart control chart is a widely used statistical control tool that helps detect a possible process shift (out-of-control process). Though the Shewhart chart is in theory a monitoring tool that reveals only the result of a hypothesis testing. In practice chart's signalling is often used as the evidence for making process adjustment. In this paper we develop a process mean estimator for processes monitored by Shewhart charts. This mean the estimate can serve as an important reference for investigating assignable causes and taking appropriate corrective actions. A semiconductor fabrication process is used as an example to illustrate the methodology.
Type
journal article
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