Reference number
ISO 7873:1993
© ISO 2025
ISO 7873:1993
Control charts for arithmetic average with warning limits
Edition 1
1993-12
Withdrawn
Withdrawn (Edition 1, 1993)

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

  • Status
     : Withdrawn
    Publication date
     : 1993-12
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 13
  • Technical Committee :
    ISO/TC 69/SC 4
    ICS :
    03.120.30 
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