To analyze and improve your quality performance, you need to have some quality management metrics that can help you measure and evaluate your quality performance. These metrics are quantitative or qualitative indicators that show how well your products, services, or processes meet the quality standards and expectations of your customers and stakeholders. For instance, customer satisfaction can be determined by surveys, feedback, reviews, ratings, referrals, or retention rates; defect rate can be calculated by the number or percentage of defects or errors per unit; yield can be measured by the ratio or percentage of output to input; cycle time can be measured by the time or duration from the start to the end of a process or a task; and cost of quality can be determined by the sum or difference of the cost of prevention, the cost of appraisal, the cost of internal failure, and the cost of external failure. With these metrics, you can monitor and track your quality performance, identify and solve quality problems or defects, and demonstrate and communicate your quality results and achievements.