This PDCA Cycle is a four-step iterative problem-solving technique used to improve business processes. The PDCA Cycle was developed in the 1920s by American physicist Walter A. Shewhart and is based on the continuous evaluation of management practices and management's willingness to adopt and reject unsupported ideas. After this, Dr. W. Edwards Deming, a quality control pioneer, popularised the method in the 1950s, coining the term "Shewhart" Cycle. During World War II, Deming recognized that the PDCA Cycle could be used to improve production processes. Many large corporations, including Toyota and Nike, have experienced significant growth after implementing PDCA or Six Sigma methodologies.