A source of quality failure that lies outside the process, and so is intermittent/unpredictable/unstable. Sometimes called an Assignable Cause.
See also Special Cause Variation, Common Cause, and Common Cause Variation
A source of quality failure that lies outside the process, and so is intermittent/unpredictable/unstable. Sometimes called an Assignable Cause.
See also Special Cause Variation, Common Cause, and Common Cause Variation