Column: Technical Aids: An Early-Warning Test for Use with the Shewhart p Control Chart

Article

Nelson, Lloyd S.   (1983, ASQC)   Nashua Corporation

Journal of Quality Technology    Vol. 15    No. 2
QICID: 5446    April 1983    pp. 68-71
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Article Abstract

A supplementary test for a p control chart consisting of counting the number S of successive occurrences of nonconforming items in subgroup is given with a table of the probabilities of getting at least S forsubgroup sizes n = 15(5)30, 40, 60, 100andbinomial p = 0.005, 0.01(0.01)0.06(0.02)0.20, 0.25, 0.30, 0.40, 0.50.

Keywords

Control charts,Statistical tests,Shewhart control chart


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