Every organization carries a silent drain on its profits—errors, rework, warranty claims, and customer dissatisfaction. In Lean Six Sigma, the Cost of Poor Quality (COPQ)  is the metric that brings these hidden costs into the light. By expressing inefficiency in dollars and cents, COPQ gives leaders a compelling reason to act. What Is COPQ? According to the American Society for Quality (ASQ) , COPQ refers to “the costs associated with providing poor-quality products or servic