How is approved supplier coverage calculated?

Approved suppliers divided by total active suppliers, times 100. With 235 of 250 fully qualified, coverage is 94%, one point short of a 95% target, with 15 suppliers left to qualify.

What is a good coverage rate?

Mature systems run 95 to 100% for direct material and hold critical and sole-source suppliers at 100%. The better question is the spend skew: whatever the rate, is the uncovered remainder low-spend or where the money goes?

Why compare spend share with count share?

Because counting suppliers equally is the metric's blind spot: one unapproved sole-source can outweigh dozens of approved minor vendors. If 94% of suppliers but 80% of spend is approved, the count rate flatters the exposure.

Does 100% coverage mean the supply base is controlled?

It means every active supplier completed qualification at some point. Audits age, PPAPs go stale and agreements lapse, none of which this snapshot sees unless your definition expires them. Pair coverage with requalification tracking.

Supplier Quality, Development & Audits calculator

Approved Supplier Coverage Calculator: Count Share and Spend Share

Measure how much of the active supply base has completed qualification, and whether the unapproved remainder matters. Enter approved and total counts, your target and the approved spend share; the rate, gap and skew come back.

What this calculator does

Report qualification coverage, the gap to target and whether unapproved spend is material.

Formula used

Coverage rate = approved suppliers ÷ total active suppliers × 100
Gap to target = coverage rate − target rate (negative = below)
Suppliers not yet approved = total active − approved
Spend skew = approved spend share − coverage rate

Inputs explained

Fully Approved Suppliers: Suppliers meeting every step of your approval definition.
Total Active Suppliers in Scope: Suppliers shipping or holding open orders in scope.
Target Coverage Rate: Your system's committed coverage rate.
Share of Spend With Approved Suppliers: Share of spend placed with the approved set.

How to use the result

Best suited to preparing AVL completeness evidence, prioritizing the qualification backlog, reporting exposure with the spend skew.
The count rate weights a bracket vendor and a sole-source casting house equally. Coverage says a qualification exists, not that it is current.

Current U.S. benchmarks

U.S. manufacturing runs at 75.7% of capacity (Federal Reserve, Aug 2026). New factory orders are up 8.5% year over year (Census).

Common questions

How is approved supplier coverage calculated? Approved suppliers divided by total active suppliers, times 100. With 235 of 250 fully qualified, coverage is 94%, one point short of a 95% target, with 15 suppliers left to qualify.
What is a good coverage rate? Mature systems run 95 to 100% for direct material and hold critical and sole-source suppliers at 100%. The better question is the spend skew: whatever the rate, is the uncovered remainder low-spend or where the money goes?
Why compare spend share with count share? Because counting suppliers equally is the metric's blind spot: one unapproved sole-source can outweigh dozens of approved minor vendors. If 94% of suppliers but 80% of spend is approved, the count rate flatters the exposure.
Does 100% coverage mean the supply base is controlled? It means every active supplier completed qualification at some point. Audits age, PPAPs go stale and agreements lapse, none of which this snapshot sees unless your definition expires them. Pair coverage with requalification tracking.

Last reviewed 2026-10-01.