. While PDCA and DMAIC both focus on improvement, they are distinct methodologies.
The PDCA (Plan-Do-Check-Act) cycle is a model for continuous improvement and problem-solving. It consists of four stages:
Imagine you are leading a process improvement team at a factory. You propose using PDCA to reduce defects. A team member says: “Let’s start with the Define phase, then Measure, then Analyze…”
Six months later, Apex Components cut its defect rate by 18% — not because they invented a better cycle, but because they finally followed the real one.
She gave everyone 30 seconds. Then she asked for a show of hands.
The standard Plan-Do-Check-Act (PDCA) cycle, also known as the Deming Wheel, consists strictly of four iterative stages: Plan, Do, Check, and Act. Terms such as Analyze, Define, Design, or Approve are not part of this continuous improvement framework, which is often confused with Six Sigma's DMAIC methodology. For a more detailed breakdown, you can read the article at ASQ .
