A brief tutorial on the estimation of the process standard deviation
作者:
STEPHENB. VARDEMAN,
期刊:
IIE Transactions
(Taylor Available online 1999)
卷期:
Volume 31,
issue 6
页码: 503-507
ISSN:0740-817X
年代: 1999
DOI:10.1080/07408179908969853
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
We consider the common SQC problem of estimating a process standard deviation based on several sample ranges or sample standard deviations. Simple, well-known facts that are used to produce “control chart constants” can also provide guidance in the combining of such ranges or standard deviations for normal processes. Root mean squared errors for both unbiased linear estimators common in the literature and some (biased) optimal estimators are shown to be simple functions of these constants.
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