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

Summary: 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.

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  • Topics:
  • Keywords: Control charts,Statistical tests,Shewhart control chart
  • Author: Nelson, Lloyd S.
  • Journal: Journal of Quality Technology