Plan-Do-Check-Act (PDCA) is an iterative problem solving framework developed around 1950s by Edward Deming.

PDCA is used to improve processes, products, and services, by improving upon quality, reliability, productivity, and effectiveness. PDCA is an improvement cycle, and is also known as dynamic improvement.

Plan: Involves gathering data, defining the issue, and identifying potential solutions. Do: Involves the execution of plans and action steps. Check: Involves reviewing results and analyzing the outcomes. Act: involves taking Action on improvement ideas.

The PDCA cycle is repeated until the desired improvement is achieved.