How do you calculate bond rework exposure?

Multiply the number of suspect assemblies by the repair cost per assembly and by the expected rework percentage, then add the fixed teardown and setup charge. With 16 assemblies at $95 each, a 70% hit rate, and a $240 teardown charge, expected repair exposure is $1,064 and total exposure is $1,304.

Why add a teardown and setup charge separately?

Teardown, de-fixturing, and re-fixturing costs are incurred per containment event, not per part. On a 16-piece lot that $240 charge is 18% of the total exposure, so folding it into a per-assembly rate would understate small-batch cost and overstate large-batch cost.

What is the difference between repair cost per assembly and effective repair cost?

Repair cost per assembly ($95 here) is the cost when a unit actually needs work. The effective or blended figure ($81.50) is that cost adjusted by the 70% likelihood of needing rework plus the teardown charge spread across the lot, which is closer to what you should budget per part.

What is a good rework exposure percentage for adhesive bonds?

There is no universal target, but mature structural bonding lines run rework rates in the low single digits. A 70% expected-rework figure on a flagged lot signals a process out of control, usually from surface-prep or cure problems, and should trigger root-cause analysis, not just rework budgeting.

Should I rework or scrap failed bonded assemblies?

Compare total exposure here against scrap-and-rebuild cost plus the value of the substrate. If teardown risks damaging the substrate, or exposure approaches new-build cost, scrap is often cheaper and lower-risk than rework.

Does this include the cost of re-inspection after rework?

No. The calculator covers repair labor and teardown only. Add pull-test or NDT re-inspection time separately, since reworked structural bonds typically require the same proof testing as first-build joints.

Adhesives, Sealants & Industrial Bonding calculator

Bond Rework Exposure Calculator

Bond Rework Exposure quantifies the dollars at risk when adhesive or sealant joints fail inspection and have to be repaired. Bonding engineers and quality managers use it to put a price tag on a batch of suspect assemblies before deciding whether to rework, scrap, or release with a deviation. Unlike a simple defect count, it weights the repair cost by the probability that flagged assemblies actually need work and adds the fixed teardown and fixturing charge that hits regardless of volume. That distinction matters because the teardown line is often the dominant cost on small lots, and ignoring it leads shops to under-quote warranty and containment budgets.

What this calculator does

Estimate rework cost exposure for bonded assemblies from rework quantity, repair cost, expected recovery share, and setup charge.
a production manager needs to estimate cost exposure from bonding defects found after assembly
It computes the expected dollar cost of reworking failed bonded assemblies as the weighted repair cost across the suspect population plus a fixed teardown and setup charge.

Formula used

Expected repair exposure = assemblies needing rework × repair cost per assembly × expected rework exposure
Bond rework exposure = expected repair exposure + teardown and setup charge

Inputs explained

Assemblies needing bond rework:
Repair cost per assembly:
Expected rework exposure:
Teardown and setup charge:

How to use the result

Use it during containment of a bonding nonconformance, when quoting warranty rework, or when comparing rework versus scrap on a flagged lot.
The expected exposure percentage is an estimate of how many flagged assemblies truly need rework; if your inspection has high false-call or escape rates, the weighted figure will be off and you should validate it against actual teardown results.

Current U.S. benchmarks

The producer price index for industrial chemicals stands at 344.336 (BLS, May 2026), up 16.1% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 11,391 plastics and rubber products establishments employing about 815,988 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate bond rework exposure? Multiply the number of suspect assemblies by the repair cost per assembly and by the expected rework percentage, then add the fixed teardown and setup charge. With 16 assemblies at $95 each, a 70% hit rate, and a $240 teardown charge, expected repair exposure is $1,064 and total exposure is $1,304.
Why add a teardown and setup charge separately? Teardown, de-fixturing, and re-fixturing costs are incurred per containment event, not per part. On a 16-piece lot that $240 charge is 18% of the total exposure, so folding it into a per-assembly rate would understate small-batch cost and overstate large-batch cost.
What is the difference between repair cost per assembly and effective repair cost? Repair cost per assembly ($95 here) is the cost when a unit actually needs work. The effective or blended figure ($81.50) is that cost adjusted by the 70% likelihood of needing rework plus the teardown charge spread across the lot, which is closer to what you should budget per part.
What is a good rework exposure percentage for adhesive bonds? There is no universal target, but mature structural bonding lines run rework rates in the low single digits. A 70% expected-rework figure on a flagged lot signals a process out of control, usually from surface-prep or cure problems, and should trigger root-cause analysis, not just rework budgeting.
Should I rework or scrap failed bonded assemblies? Compare total exposure here against scrap-and-rebuild cost plus the value of the substrate. If teardown risks damaging the substrate, or exposure approaches new-build cost, scrap is often cheaper and lower-risk than rework.

Last reviewed 2026-05-12.