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Icon ISO
Norm

ISO 7873:1993

Ausgabedatum: 1993 12 23

Control charts for arithmetic average with warning limits

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...
ZURÜCKGEZOGEN: 2014 12 10
Herausgeber:
International Organization for Standardization
Format:
Digital | 13 Seiten
Sprache:
Englisch

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.