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政大典藏 > College of Commerce > Department of Statistics > Periodical Articles > Item 140.119/18199

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Title:	An Approach to Controlling Process Variability for Short Production Runs
Authors:	楊素芬 Yang, Su-Fen
Contributors:	統計系
Date:	1999-12
Issue Date:	2008-12-19 14:54:53 (UTC+8)
Abstract:	A Shewhart R control chart is developed to monitor the process variance for large production runs. It is not appropriate to monitor the process variance using the Shewhart R control chart for short production runs. In this paper, we propose the design of the R control chart for short production runs. For various combinations of the number of samples and the size of each sample, control coefficients of the R control chart are calculated by numerical methods. Using these results, the R control chart for short production runs is developed to monitor the process variance correctly. Finally, the design procedure of the R control chart for short production runs and the results of misusing the Shewhart R control chart are illustrated by an example.
Relation:	Total Quality Management Journal, 10(8), 1123-1129
Data Type:	article
DOI link:	http://dx.doi.org/10.1080/0954412997109
DOI:	10.1080/0954412997109
Appears in Collections:	[Department of Statistics] Periodical Articles

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