The document outlines when and how to use the Plan-Do-Check-Act (PDCA) model for continuous improvement. PDCA should be used (1) for new improvement projects, developing new processes, repetitive work processes, and data collection; and (2) when implementing any change. The model involves planning changes, implementing them, measuring the results, and determining if further refinement is needed. When no improvements are identified, the scope of PDCA application is refined until an opportunity for improvement is found.