Common Cause Variation

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Common Cause Variation Download Products Root Cause Analysis Course - Spanish Edition Root Cause Analysis Course Gage R&R Excel Template Common cause variation is fluctuation caused by unknown factors resulting in a steady but random distribution of output around the average of the data. It is a measure of the process potential, or how well the process can perform when special cause variation removed. Common cause variability is a source of variation caused by unknown factors that result in a steady but random distribution of output around the average of the data. Common cause variation is a measure of the process's potential, or how well the process can perform when special cause variation is removed. Therefore, it is a measure of the process technology. Common cause variation is also called random variation, noise, noncontrollable variation, within-group variation, or inherent variation. Example: Many X's with a small impact. Common cause variation is the remaining variation after removing the special causes (non-normal causes) due to one or more of the 5Ms and an "E" causes (Manpower, Material, Method, Measurement, Machine, and Environment), also known as 6Ms (Man power, Mother nature, Materials, Method, Measurements or Machine). ---------- See also *Common Cause*, *Special Cause*, *Special Cause Variation*. Posted By: Modified By: Mark Last Modified: Jun. 17, 2003

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