It involves specifying a theory or hypothesis, including a Procedure for testing it.
The four corners of the Process icon stand for the Shewhart Process-cycle definition of “Plan-Do-Study-Act”.
The “Plan” phase sets out the order and timing of tasks and events that need to occur to achieve the “Do” phase. In addition, Plan specifies the entry and Exit-Conditions for the “Do” phase, including the criteria for terminating it early (prior to required results being achieved) and the testing procedures. It also plans the Resources required.
Plan is the west side of the rectangular Process symbol.
This Concept entered by Diane O'Brien.