Improved Fast Initial Response Features for Exponentially Weighted Moving Average and Cumulative Sum Control Charts

Improved Fast Initial Response Features for Exponentially Weighted Moving Average and Cumulative Sum Control Charts

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Article ID: iaor201523846
Volume: 30
Issue: 5
Start Page Number: 697
End Page Number: 710
Publication Date: Jul 2014
Journal: Quality and Reliability Engineering International
Authors: , ,
Keywords: control charts, cusum charts
Abstract:

Exponentially weighted moving average (EWMA) and cumulative sum (CUSUM) control charts have found extensive applications in industry. The sensitivity of these quality control schemes can be increased by using fast initial response (FIR) features. In this paper, we introduce some improved FIR features for EWMA and CUSUM control charts and evaluate their performance in terms of average run length. We compare the proposed FIR‐based EWMA and CUSUM control schemes with some existing control schemes, that is, EWMA, FIR‐EWMA, CUSUM, and FIR‐CUSUM. It is noteworthy that the proposed control schemes are uniformly better than the other schemes considered here. An illustrative example is also given to demonstrate the implementation of the proposed control schemes.

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