What is the purpose of QC metrics and how are they used for improvement?

• A. To assign blame to workers.
• B. To measure performance, identify trends, and drive corrective actions and training to raise quality.
• C. To meet marketing needs.
• D. To schedule social events.

Answer: (B)

Measuring quality with QC metrics turns quality into actionable data. These metrics quantify how well a process is performing so you can track it over time and see whether changes are helping. By setting indicators like defect rate, rework rate, or first-pass yield, you establish a baseline and targets. Watching these numbers reveals trends—whether performance is improving, leveling off, or slipping—so you can respond before problems grow large. When a metric shows a gap, you conduct root-cause analysis, implement corrective actions such as process adjustments, equipment maintenance, or changes in workflow, and then verify the impact. The data also points to where training is needed, so you can upskill the team to prevent recurrence and sustain quality gains. The aim is to improve processes, not to assign blame, fostering a culture of continuous improvement. This data-driven approach supports systematic problem solving and aligns with the Plan-Do-Check-Act cycle. For example, noticing a rising rework rate prompts investigation, a fix is applied, and subsequent metrics show reduced rework and higher quality. Metrics serve to measure, learn, and improve, not for marketing or social scheduling.