syque.com

The Psychology of Quality and More

| Menu | Books | Share | Search | Settings |

Common causes of variation

Within any process there are many variable factors (such as wind and muscle tremors in firing a gun) each of which may vary a small amount and in a predictable way, but when taken together result in a degree of randomness in the output, as indicated in the figure below. These seemingly uncontrollable factors are called common causes of variation.

Common causes of variation cannot be eliminated by reacting to individual variations. The spread in results can only be reduced through a deep understanding of how the process works.

Control Charts can be used to differentiate between common and special causes of variation.

See also:

Control Chart, Variation, Special causes

Toolbook chapter: Variation

Site Menu

| Home | Top | Settings |

Quality: | Quality Toolbook | Tools of the Trade | Improvement Encyclopedia | Quality Articles | Being Creative | Being Persuasive |

And: | C Style (Book) | Stories | Articles | Bookstore | My Photos | About | Contact |

Settings: | Computer layout | Mobile layout | Small font | Medium font | Large font | Translate |

 

You can buy books here

More Kindle books:

And the big
paperback book


Look inside

 

Please help and share:

 

| Home | Top | Menu |

© Changing Works 2002-2015
Massive Content -- Maximum Speed