How is an on-time quality score calculated?

Two measured rates multiplied: the share of lots on time times the share accepted, divided by 100. The worked example's 93.33% and 97.5% give 93.33 × 97.5 ÷ 100 = 91.0, all from receipt records.

Why multiply the rates instead of averaging?

Because averaging lets one factor buy back the other: 100% on time and 80% accepted would average 90. Multiplied, the same supplier scores 80. The product says a late good lot and an on-time bad lot are both failures.

What is a good on-time quality score?

The product makes targets stricter than they look: 95 combined requires roughly 97.5% on each factor. Set the target from the factor performance you expect, and read misses through the factor rows.

Should a lot that is both late and rejected count twice?

Yes, once in each factor. The lot degraded delivery and quality, and each rate reports its own population. Removing the overlap would let a supplier concentrate failures into the same lots and improve the score.

Supplier Quality, Development & Audits calculator

Supplier On-Time Quality Score Calculator: OTD × Acceptance

Score a supplier from receipt records, the way combined delivery-quality metrics are built. Enter lots received, on time and rejected plus your target; both factor rates, their product and the gap come back.

What this calculator does

Combine on-time delivery and lot acceptance into the standard multiplied score.

Formula used

On-time delivery rate = lots on time ÷ lots received × 100
Lot acceptance rate = (lots received − lots rejected) ÷ lots received × 100
On-time quality score = delivery rate × acceptance rate ÷ 100
Gap to target = score − target score

Inputs explained

Lots Received in the Period: All lots received in the scoring window.
Lots Delivered on Time: Lots arriving on or before the committed date, in full.
Lots Rejected: Lots rejected at receiving or attributed back.
Target Score: The combined score your program expects.

How to use the result

Best suited to grading suppliers monthly on delivery and quality, splitting a below-target score into factors, catching the fast but defective supplier.
Lot counting weights a ten-piece and a ten-thousand-piece lot equally. Acceptance measures what receiving caught; escapes flatter the score.

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 an on-time quality score calculated? Two measured rates multiplied: the share of lots on time times the share accepted, divided by 100. The worked example's 93.33% and 97.5% give 93.33 × 97.5 ÷ 100 = 91.0, all from receipt records.
Why multiply the rates instead of averaging? Because averaging lets one factor buy back the other: 100% on time and 80% accepted would average 90. Multiplied, the same supplier scores 80. The product says a late good lot and an on-time bad lot are both failures.
What is a good on-time quality score? The product makes targets stricter than they look: 95 combined requires roughly 97.5% on each factor. Set the target from the factor performance you expect, and read misses through the factor rows.
Should a lot that is both late and rejected count twice? Yes, once in each factor. The lot degraded delivery and quality, and each rate reports its own population. Removing the overlap would let a supplier concentrate failures into the same lots and improve the score.

Last reviewed 2026-10-01.