The Deming Change Cycle progresses through four cyclical stages that must be followed in order. They are: plan, do, study, and act.
- Plan: The first step in the process is to determine the ultimate goal that should be achieved by the end of the change process. This can be any product or procedure that needs to be modified. Additionally, during this stage the organization needs to consider how realistic that goal is, what potential roadblocks could hinder the change process, as well as how accurate the organization is in recognizing these issues. Once this diagnosis is complete and the organization is confident in the accuracy of what needs to be addressed, the final part of the planning stage is to create a roadmap with concrete steps for implementing the change process and achieving the set goal.
- Do: The plan should be executed over a long span of time and should be done in small steps. Additionally, each step toward achieving the product goal requires time because there is much trial and error involved. This process should function somewhat like a scientific investigation and a detailed log should be kept recording what processes were more successful than others. In this way, the organization will have information not only on what methods will lead to product improvement, but also the reasons these methods were successful.
- Study: This stage begins at the end of each trial in the change process. During the study phase, the organization carefully scrutinizes whether the goal was achieved, which involves a detailed examination of whether the processes or products were improved, and if the reason for the better quality aligns with what the organization intended to do. Said differently, the study phase involves determining how well the organization was able to accurately predict the outcome of the change process. If there is a distinction between what was expected and what was observed, the organization should create a list of possible explanations for these distinctions.
- Act: After selecting the change that will produce the biggest quality improvement, the final stage is to implement it. A detailed record should also be kept at this stage to obtain more information about what aspects of the business the change improved. At the end of the change process, the knowledge obtained and documented in these logs should be used to identify other changes to be met, thus starting the cycle anew.




