A Simplified Scheme for the Economic Design of X̄-Charts
作者:
ChiuW. K.,
WetherillG. B.,
期刊:
Journal of Quality Technology
(Taylor Available online 1974)
卷期:
Volume 6,
issue 2
页码: 63-69
ISSN:0022-4065
年代: 1974
DOI:10.1080/00224065.1974.11980621
出版商: Taylor&Francis
关键词: X̄-Charts;Economic Design;Semi-Economic Design;Optimum Design
数据来源: Taylor
摘要:
This paper proposes a very simple semi-economic scheme for the design of a control plan using an X̄-chart, that can be applied at the work-shop level. Once the quality control engineer has selected a consumer's risk point on the OC-curve for his desired degree of protection against inferior quality, he can quickly determine by a table provided three control parameters: the sample size, the control limits coefficient, and the sampling interval. Three features may be mentioned: (1.) Although these parameters only minimize the average loss-cost subject to a constraint, the restricted minimum is in general very close to the exact minimum. (2.) The present method has wide practical applications-three models being studied here. (3.) If an exact optimum is sought, the present solution provides a good initial point for a direct search.
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