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”.
“Study the results, what did we learn, what went wrong?”
W. E. Deming [Personal Communication 1991]
In Evo, the “Study” phase (P3 in Procedure.SM) is the equivalent of the more general PDSA Concept “Study”. Study in Evo is the phase where we analyze all the feedback from the last step, in relation to Requirements and external impulses (like change of market or law).
Suggestion “?]”. A rough draft for the icons [January 21, 2003, TG]:
Plan [> left side of Process rectangle and a Goal “>“ symbol.
Do ^! Top side of Process rectangle and an Action symbol “!”
Study ?] right side of Process rectangle and an an inquisitive symbol “?”.
Act V± bottom side of Process rectangle and a take it or leave it symbol “±”.
Study is the east side of the rectangular Process symbol.
This Concept entered by Diane O'Brien.