How many validation lots should I budget for?

The number your protocol's statistical rationale supports. FDA's quality system inspection guide (1999) lists a statistically valid sampling rationale among its validation study checks, so justify lots and samples in the protocol.

What does a failed validation lot cost?

At least the cost to rerun one lot: its devices and test fees. Add the hours to investigate, amend the protocol and run the lot again at your engineering rate; this calculator does not estimate them.

What should test fees per lot include?

Every outside lab charge for one lot's samples: package integrity and seal strength, sterility or bioburden, and functional tests. Put in-house testing time in protocol and report hours.

Why is validation cost per device so far above standard cost?

Engineering hours and test fees land on a small batch, and every device is treated as consumed. Judge the total against your validation budget, not a per-device figure.

MedTech Manufacturing calculator

Process Validation Batch Cost Calculator

Estimate a process validation budget before you approve the protocol. You need batch size, lot count, standard cost per device, outside test fees per lot, and the engineering hours and rate to write, run and report it.

What this calculator does

Cost to build, test and document process validation lots, and what rerunning one failed lot adds.

Formula used

Cost of devices built = validation batch size × cost per device built
Test fees = validation lots × test fees per lot
Engineering cost = protocol and report hours × engineering rate
Total validation batch cost = cost of devices built + test fees + engineering cost
Cost to rerun one lot = validation batch size ÷ validation lots × cost per device built + test fees per lot

Inputs explained

Validation Batch Size: Devices built across all validation lots, test samples included.
Validation Lots: Number of lots your validation protocol calls for.
Cost per Device Built: Material and direct labor for one device, from standard cost.
Test Fees per Lot: Lab quote for one lot's samples: package, seal, sterility, functional tests.
Protocol and Report Hours: Engineer hours to write, run, analyze and report the protocol.
Engineering Rate: Burdened hourly cost of validation engineers, or a consultant's rate.

How to use the result

Best suited to budgeting process validation for a new line, pricing revalidation after a material or supplier change, comparing lot sizes before approving the protocol.
Counts no devices as recovered; devices you may release for sale after approval lower the true cost. Excludes lost production time, engineering hours to investigate and rerun a failed lot, and equipment qualification.

Current U.S. benchmarks

U.S. manufacturing runs at 75.7% of capacity with new factory orders at $663B per month (Federal Reserve and Census, Aug 2026).
The U.S. has 8,825 medical equipment and supplies establishments employing about 308,388 workers (Census County Business Patterns, 2023).

Common questions

How many validation lots should I budget for? The number your protocol's statistical rationale supports. FDA's quality system inspection guide (1999) lists a statistically valid sampling rationale among its validation study checks, so justify lots and samples in the protocol.
What does a failed validation lot cost? At least the cost to rerun one lot: its devices and test fees. Add the hours to investigate, amend the protocol and run the lot again at your engineering rate; this calculator does not estimate them.
What should test fees per lot include? Every outside lab charge for one lot's samples: package integrity and seal strength, sterility or bioburden, and functional tests. Put in-house testing time in protocol and report hours.
Why is validation cost per device so far above standard cost? Engineering hours and test fees land on a small batch, and every device is treated as consumed. Judge the total against your validation budget, not a per-device figure.

Last reviewed 2026-10-01.