Common Cause Variation

Common Cause Variation is a source of variation caused by unknown factors, which results 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.

Also known as Random Variation, Noise, Non Controllable Variation, Within-Group Variation, or Inherent Variation.