Run Chart Overview
main topic     

Variation occurs in all processes. Common cause variation is a natural part of the process. Another type of variation, called special causes, comes from outside the system and causes recognizable patterns, shifts, or trends in the data. The run chart shows if special causes are influencing your process. A process is in control when only common causes affect the process output. Run Chart performs two tests for randomness that provide information on the non-random variation due to trends, oscillation, mixtures, and clustering. For details, see Using the Tests for Randomness.