ISO 7873:1993
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ISO 7873:1993
14806

Abstract 

Specifies procedures for the statistical control of processes by using control charts based on calculating the arithmetic average of a sample and using warning limits and action limits. It is assumed that for large lots and for the mass output of piece and batch production, such a measure of quality is a random variable following a normal distribution. However, when averages of four or more items are plotted, this assumption of a normal distribution is not necessary for control purposes.


General information 

  •  :  Withdrawn
     : 1993-12
  •  : 1
     : 13
  •  : ISO/TC 69/SC 4 Applications of statistical methods in product and process management
  •  :
    03.120.30 Application of statistical methods

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