Plan-Do-Study-Act cycle

A structured trial of a process change. Drawn from the Shewhart cycle, this model includes: Plan - a time to organize the change in anticipation of its execution; Do - a time to try the change and observe what happens; Study - an analysis of the results of the trial; and Act - devising next steps based on the analysis, such as learning from errors in the trial so they are not repeated next time.

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