How these connect
Speed matters. But quality matters more.
The trap in measuring customer support is optimizing for speed at the expense of resolution. A team that closes tickets fast but doesn't solve problems looks great on dashboards and creates customers who churn. The honest read on a CS function comes from reading these five metrics together — not any one of them in isolation.
First Response Time and Time to Resolution together tell you about speed. A fast first response with slow resolution means agents are acknowledging tickets but not equipped to solve them. A slow first response means you're under-staffed or queue management is broken. Both matter, in different ways.
CSAT and NPS tell you about quality. Speed without quality is just performance theater. A team with 30-minute response times and 65% CSAT is creating churn faster than one with 2-hour response times and 90% CSAT. The customer remembers whether the problem got solved, not whether someone said "hi" quickly.
Ticket Volume per Customer and Self-Service Rate tell you whether the support function is scaling. If volume per customer is rising, the upstream cause (product, onboarding, documentation) needs attention before more agents do. If self-service rate is rising, you're earning the right to grow without proportional headcount.