How do you calculate nonconformance closure rate?

Divide the number of NCRs closed by the number opened in the same period and multiply by 100. Closing 230 against 250 opened gives a 92% closure rate.

What is a good nonconformance closure rate?

Mature QMS programs aim for closure rates at or above their target (commonly 90-95%) within a defined window, so open and closed volumes stay balanced. A 92% rate signals a fast-growing backlog needing attention.

Why is my closure-rate gap negative or huge?

The gap subtracts the target from the actual rate. Here 92% against a 95 target yields a gap of 3 points, meaning you're closing far fewer NCRs than you're opening in this window.

Should the denominator be opened or total open NCRs?

Both are used. Closed-vs-opened tracks whether you keep up with inflow; closed-vs-total-open measures how fast you drain the existing backlog. Pick one and stay consistent so trends hold.

Closure rate vs. on-time closure, what's the difference?

Closure rate asks how many you closed at all; on-time closure asks how many you closed within the due date. On-time closure is stricter and catches issues that closed late.

How does a low closure rate affect an audit?

Auditors read a persistently low closure rate as ineffective corrective action, a common nonconformity finding itself. Aging, unclosed NCRs suggest the QMS isn't driving issues to resolution.

QMS, CAPA & Quality System Management calculator

Nonconformance Closure Rate Calculator

Nonconformance closure rate measures what share of your open nonconformances (NCRs) you actually close within a period, a core health metric for any corrective-action process. Quality engineers and QMS managers watch it because a growing backlog of open NCRs is the clearest early sign that root-cause work is falling behind production reality. Auditors also scrutinize it: ISO 9001 and IATF 16949 expect nonconformities to be resolved in a timely, controlled way, and a low closure rate is a common finding. Tracking it keeps the CAPA pipeline moving and prevents stale, aging issues from piling up.

What this calculator does

Estimate nonconformance closure rate for qms, capa and quality system management using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.
Use it when nonconformance closure rate in qms, capa and quality system management needs a clean rate and gap-to-target you can put on a tier board.
It divides nonconformances closed by nonconformances opened in the same period and multiplies by 100, then subtracts your target closure rate to show the gap.

Formula used

Nonconformance closure rate = nonconformance closure rate count ÷ total nonconformance closure rate population × 100
Nonconformance closure rate gap to target = target nonconformance closure rate − nonconformance closure rate (positive = below target)

Inputs explained

Nonconformances closed in period:
Nonconformances opened in period:
Target closure rate:

How to use the result

Use it in weekly or monthly quality reviews to gauge whether your team is keeping pace with incoming nonconformances and to prep for audits.
A closure rate can be gamed by closing easy NCRs while hard ones age, pair it with an aging report so speed doesn't mask backlog of the difficult, high-risk cases.

Current U.S. benchmarks

U.S. manufacturing runs at 76.0% of capacity (Federal Reserve, Jul 2026). New factory orders are up 7.4% year over year (Census).

Common questions

How do you calculate nonconformance closure rate? Divide the number of NCRs closed by the number opened in the same period and multiply by 100. Closing 230 against 250 opened gives a 92% closure rate.
What is a good nonconformance closure rate? Mature QMS programs aim for closure rates at or above their target (commonly 90-95%) within a defined window, so open and closed volumes stay balanced. A 92% rate signals a fast-growing backlog needing attention.
Why is my closure-rate gap negative or huge? The gap subtracts the target from the actual rate. Here 92% against a 95 target yields a gap of 3 points, meaning you're closing far fewer NCRs than you're opening in this window.
Should the denominator be opened or total open NCRs? Both are used. Closed-vs-opened tracks whether you keep up with inflow; closed-vs-total-open measures how fast you drain the existing backlog. Pick one and stay consistent so trends hold.
Closure rate vs. on-time closure, what's the difference? Closure rate asks how many you closed at all; on-time closure asks how many you closed within the due date. On-time closure is stricter and catches issues that closed late.

Last reviewed 2026-08-12.