How do you calculate rework cost for bioprocess assemblies?

Multiply the number of reworked assemblies by the per-assembly labor and component cost, apply the first-pass rework yield, then add the fixed re-inspection setup. With 30 assemblies at $145 each, 85% yield and a $650 setup, total rework cost is $4,347.50, or $144.92 per assembly.

What is a good rework cost per assembly?

Lower is better, but the honest benchmark is comparison to scrap-and-remake. If per-assembly rework ($144.92 in the example) is well below the fully burdened cost of building a fresh sterile assembly plus lost material, rework wins; if it approaches that figure, scrap it.

Why include first-pass rework yield in the cost?

Not every reworked single-use assembly passes re-inspection. Applying an 85% yield scales the variable cost to reflect that some rework effort is spent on units that still fail, giving a more realistic $3,697.50 variable cost rather than the raw $4,350.

Rework vs scrap for single-use assemblies — which is cheaper?

Compare per-assembly rework cost to the burdened cost of a new assembly including gamma irradiation and lot release. Single-use components are often the largest cost driver, so if the failure is a labeling or documentation issue rework usually wins; if a filter or bag is compromised, scrap.

What is included in re-inspection setup cost?

It is the fixed cost incurred once per rework event regardless of quantity: pulling the lot, staging a clean workstation, re-qualifying gauges or integrity-test rigs, and QA sign-off. In the example this $650 is spread across 30 units, adding about $21.67 each.

How does rework cost feed into cost of poor quality?

The total rework cost ($4,347.50 here) is an internal failure cost in your COPQ ledger. Tracking it per lot and per defect code reveals which single-use SKUs or suppliers drive the most avoidable spend.

Single-Use Bioprocess Assemblies calculator

Rework Cost Calculator

Rework cost tells you what it actually costs to salvage single-use bioprocess assemblies (tubing sets, filter capsules, bag manifolds) that fail incoming or in-process inspection instead of scrapping them. Quality and operations managers on single-use assembly lines use it to decide whether rework is cheaper than scrap-and-remake, and to load the correct cost into COPQ reports. Because these assemblies are gamma-irradiated, aseptically welded, and lot-traced, a single rework touch pulls in re-verification and re-inspection that generic 'labor times units' math ignores. Getting this number right stops rework from quietly eroding gross margin on high-mix, low-volume single-use work.

What this calculator does

Estimate rework cost for single-use bioprocess assemblies from reworked unit count, labor and replaced components, and re-inspection setup.
A cleanroom assembly cell deciding whether to rework or scrap a lot of mis-welded tubing manifolds.
It computes the total and per-assembly cost of reworking failed single-use bioprocess assemblies by combining variable labor and component cost adjusted by first-pass rework yield with a fixed re-inspection setup charge.

Formula used

Total rework cost = reworked assemblies x rework labor & components x first-pass yield + re-inspection setup
Per-assembly rework = total cost / reworked assemblies

Inputs explained

Assemblies Reworked:
Rework Labor & Components:
First-Pass Rework Yield:
Re-Inspection Setup Cost:

How to use the result

Use it when a batch of assemblies fails inspection and you must decide between rework and scrap, or when building the rework line item of a cost-of-poor-quality or quote-adjustment analysis.
The model treats first-pass rework yield as a simple cost multiplier; it does not recursively cost the fraction that fails rework a second time, so on low-yield rework loops the true cost runs higher than shown.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity with new factory orders at $657B per month (Federal Reserve and Census, May 2026).

Common questions

How do you calculate rework cost for bioprocess assemblies? Multiply the number of reworked assemblies by the per-assembly labor and component cost, apply the first-pass rework yield, then add the fixed re-inspection setup. With 30 assemblies at $145 each, 85% yield and a $650 setup, total rework cost is $4,347.50, or $144.92 per assembly.
What is a good rework cost per assembly? Lower is better, but the honest benchmark is comparison to scrap-and-remake. If per-assembly rework ($144.92 in the example) is well below the fully burdened cost of building a fresh sterile assembly plus lost material, rework wins; if it approaches that figure, scrap it.
Why include first-pass rework yield in the cost? Not every reworked single-use assembly passes re-inspection. Applying an 85% yield scales the variable cost to reflect that some rework effort is spent on units that still fail, giving a more realistic $3,697.50 variable cost rather than the raw $4,350.
Rework vs scrap for single-use assemblies — which is cheaper? Compare per-assembly rework cost to the burdened cost of a new assembly including gamma irradiation and lot release. Single-use components are often the largest cost driver, so if the failure is a labeling or documentation issue rework usually wins; if a filter or bag is compromised, scrap.
What is included in re-inspection setup cost? It is the fixed cost incurred once per rework event regardless of quantity: pulling the lot, staging a clean workstation, re-qualifying gauges or integrity-test rigs, and QA sign-off. In the example this $650 is spread across 30 units, adding about $21.67 each.

Last reviewed 2026-05-12.