PDCA cycle diagram. This is one of the top business frameworks helping clients improve on their approach to strategy, project management, IT, HR, internal processes and client experience.PDCA cycle stands for Plan, Do, Check, and Act. Plan for change to bring about improvement, Do change on a small scale first to try them, check to see if changes are working and investigate selected processes, act to get the greatest benefit from changes. PDCA cycle continues as shown on the below PDCA diagram.