Starting a Control Chart, the Effect of Number and Size of Samples on the Level of Significance at the Start of a Control Chart for Sample Means

Article

Proschan, F.; Savage, I. R.   (1960, ASQC)   Sylvania Electric Products Inc.; University of Minnesota

Industrial Quality Control    Vol. 17    No. 3
QICID: 4465    September 1960    pp. 12-13
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Article Abstract

The authors observe that the recommendations as to the number of subgroups needed to initiate a control chart for X-Bar are not fully in agreement. In this article, they determine how the level of significance is affected by the number of samples used to calculate the control limits.

Keywords

Statistical process control (SPC)

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