November 28, 2012

Steps in Statistical Process Control

As I probably mentioned before I decided to choose PIUSS topic related to the Statistical Process Control, which I can actually apply to a process of some small company. So, when I usually try to apply theory on practice the first thing that I do is identifying the steps of implementation. It shouldn’t take much time, but not in this case.

The problem is that Statistical Control appeared before Six Sigma. So, while early school of statistic analysis and control suggest 9 steps following each other in a particular order, Six Sigma combined and comprise this steps into DIMAC circle in another order. Thus, according to early studies, as the second step, just after the process description, goes cause and effect analyses, whereas in DIMAC we meet this analyses almost im the end stage “Analyse”, where the Pareto and fishbone diagram can be used to identify causes and effects and its relation by Scatter diagram.

Where is the truth?


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