The Study phase observes and gathers data concerning the results of the Do phase. It is basically concerned with “What happened?” It can involve highly varied analysis activities, depending on the activity being controlled, such as obtaining feedback data, carrying out Specification-Quality-Control (SQC) and testing.
The “Study” phase is a preparation for drawing conclusions and taking Action in the “Act” phase.
The four corners of the Process icon stand for the Shewhart Process-cycle definition of “Plan-Do-Study-Act”.
This Concept entered by Diane O'Brien.