Quality Assurance Specialist Metrics

Defect Rate is the percentage of finished units that fail to meet quality standards. It measures how many units are nonconforming at inspection, during production, or after delivery when a customer identifies a defect. Lower is better because it reflects stable processes, fewer escalations, and less rework.

Defects Per Million Opportunities measures how many defects you find for every one million chances a defect could occur in your process. It is a core Six Sigma quality metric that accounts for the complexity of a product by counting the number of possible defect points on each unit. You use it to compare processes with different designs, track quality over time, and translate defect rates into a Sigma level.

First Pass Yield (FPY) measures the percentage of units that meet specifications and pass inspection on their first attempt with no rework or repair. It shows how consistently your process produces conforming output and how much hidden capacity is lost to scrap, fixes, and retests. Track FPY at a step, line, or plant level, and segment it by product, shift, supplier, or machine to find where right-first-time quality breaks down.

Scrap Rate is the ratio of discarded units or material to the total production run, expressed as a percentage. It includes both waste material and production rejects — any output that cannot be used or sold. Scrap Rate is one of the most important quality metrics in manufacturing, typically measured in units, pieces, weight, or volume. Tracking and reducing Scrap Rate lowers raw material costs, improves throughput, and reduces industrial waste.

Ticket Reopen Rate (RR) is the percentage of resolved support tickets that customers reopen, signalling the issue was not fully resolved. Tracking this metric gives support teams a direct measure of resolution quality. A rising reopen rate can point to gaps in agent training, product knowledge, or escalation processes. Left unaddressed, it erodes customer trust and increases support volume.

Ticket Reopens is a count of how many times closed support tickets are reopened after a customer responds with an unresolved issue. When a customer replies to a ticket marked as solved, the ticket automatically reopens and receives an open status. Each reopen increments the count by one. A high Ticket Reopens count signals that resolutions aren't sticking — either because agents are closing tickets prematurely or because the underlying issue isn't being fully addressed.

Tickets, also called customer issues or incidents, are records of user or system-initiated requests captured in an issue tracking system. Each ticket documents a request such as a help inquiry, bug report, feature request, complaint, or automated alert, and tracks it from submission through resolution. Tickets also capture supporting detail including urgency, device information, and customer type to help teams triage and prioritize effectively.