Plan --> Do --> Check --> Act is a continuous improvement problem solving model based on the the scientific method. It's cyclical nature builds upon previous efforts in order to sustain improvement and achieve further gains.

 

The Plan-Do-Check-Act Cycle  

• Plan
  • Determine Current Condition
  • Describe Goal
  • Perform Root Cause Analysis on Gap between Current and Goal
  • Select Countermeasures and Develop Action Plan
• Do
  • Implement Action Plan
  • Consider safety in all actions
• Check
  • Assess Performance with Countermeasures in Place
• Act
  • Confirm Improvement (Adopt), No Change, and/or Return to Plan
  • Sustain Results