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definition-Special-Causes

Definition:

Special-Causes are non-recurrent Defect causes, and cannot be exploited by management to Systematically improve a Process organization-wide by Means of Changing the organization, Process or System.

Alternative Names

Concept Number: *019
English Master: Special-Causes
Synonyms, Variations & Acronyms: Chance-Cause

Detailing

They are not caused by the organization (training, management, motivation, information, tools); for example, not by an incorrect Work-Process-Standard.

They can be used to improve things more locally, at the Level of the individual engineer. For example, by learning that they misinterpreted a Work-Process-Standard, motivating, teaching or instructing the individual.


Illustrations

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Type

Statistical


Domain

Statistical-Process-Control
Continuous-Process-Improvement


Examples

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Notes

Dr. Walter Shewhart (Deming and Juran”s teacher of SPC) called these “Chance-Causes. The main point is that Special-Causes may be treated by the individual worker, if they are given information and power, while Common-Causes must be treated by management. W. Edward Deming”s term (“special”) is the preferred term in this book.

“A special cause of variation is something special, not part of the System of Common-Causes. It is detected by a point that falls outside the Control-Limits.” (DEMING93, pg. 179).

Keyed-Icons

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Drawn-Icons

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Common-Causes
Statistical-Process-Control-SPC
Systemic


History-of-Concept

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This Concept entered by Diane O'Brien.

Created by system. Last Modification: Thursday 11 of July, 2019 20:30:16 CEST by Admin (Kai).
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