CONTROL CHARTS WITH WARNING LINES
Open Access
- 1 June 1955
- journal article
- research article
- Published by Oxford University Press (OUP) in Biometrika
- Vol. 42 (1-2) , 243-257
- https://doi.org/10.1093/biomet/42.1-2.243
Abstract
Process inspection schemes using control charts with warning lines are considered and the properties of some schemes based on the observations from the last few samples are evaluated. Tables of schemes for controlling the mean of a normal population are given. A method is suggested for controlling both the mean and standard deviation of a population on a single chart; examples are given when the population distribution is normal.Keywords
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