the cycle of Plan-Do-Check-Act, four-step solving process typically used in quality control
(Ticaret) (plan-do-check-action) A four step quality improvement cycle, based on a process described by Walter Shewhart, that involves continuous improvement based on analysis, design, execution and evaluation. Sometimes referred to as plan/do/study/act, it emphasizes the constant attention and reaction to factors that affect quality
The Plan, Do, Check, Act cycle developed by Walter Shewhart in the 1930's and refined by W Edwards Deming