PDCA cycle was made famous by Dr. W. Edwards Deming. He was responsible for a variety of Quality Control theories and is considered one of the most important figures in the field. PDCA stands for Plan, Do, Study, Act. These words indicate four stages of quality management that continuously reoccur to build on previous improvements. This cycle is often used to manage work processes that are problematic or require additional improvement within various organizations. This paper will provide an overview of this technique based on an example of a musical instrument manufacturing company and a library; also, they will be compared to each other to find the similarities and differences in the issues that might arise during implementation. The PDCA Cycle The PDCA cycle is a relatively simple system that has shown to be effective for many processes (Hibi et al. 2016; Silva, Medeiros & Vieira 2017). Its simplicity lies in the four-step structure that loops back on itself after reaching the final step. Each step of the PDCA cycle serves a specific purpose in the practice of quality management. “Plan” helps inspect the problem by finding relevant data and its cause. “Do” focuses on the development and implementation of a solution to the problem defined by the previous step. Also, this step creates the measure by which the results of improvement will be gauged. “Check” compares the data taken before the improvement, and the data taken after its implementation to confirm the results. “Act” documents the results, spreads the information about the changes caused by the process, and chooses which changes should be made for the next cycle. Throughout these processes, a variety of tools is used (Pietrzak & Paliszkiewicz 2015). These examples should illustrate the implementation of the cycle. Fig 1.Flow chart for the original process of quality control in musical instrument manufacturing A musical instrument manufacturer utilizes a multitude of work processes within the organization. One of the most important and costly is quality assurance. For example, a factory produces 700 musical instruments a day. To manually check all each one, a person must spend at least a few minutes. This makes the need for employees high and the work process significantly slower than it could be. If a company cannot afford to hire more people, or cannot acquire an automatic checking system, the PDCA cycle can be implemented to determine the optimal solution. In the first step, a process flow chart needs to be compiled. It would serve to understand all the steps involved in the quality assurance process. Then, a cause-and-effect diagram can be created to see which step or component makes this process take longer than it needs to be. This diagram is also called the Fishbone diagram due to its shape. This diagram categorizes all the elements involved in the process, identifies potential causes, and tries to find a possible solution. Next is the “Do” step. For example, the cause of the problem was found to be in lack of quality assurance in different stages of manufacturing. After researching the appropriate positions for gradual quality assessment in the flow of the process, the “Do” process can adjust the positions of current workers according to the research findings. The “Check” step gathers the data collected by the previous step and compares it to the data that was given after the changes. By creating a histogram of the speed of asse