Consider the following left-to-right progression of the various types of Control Charts:

(A) (B) (C) (D)

Across an entire enterprise, wed find all of these different process improvement tools being used for a variety of purposes across an array of different processes at different levels of process or quality maturity. For any individual process scenario, wed probably see that control charting started on the left and progressed to the right toward whatever type of chart is dominating the thinking about the process at any given time. The charts at any position in the progression serve specific purposes, rest on different assumptions, have strengths and weaknesses, and allow certain conclusions to be drawn and acted upon. Collectively, these aspects tell the story of Statistical Process Control. For each of the four positions in the depicted progression, describe that story.

X-bar and R Charts X-bar and S Charts Individual and MR Charts CUSUM and EWMA Charts P and np Charts Cand U Charts