How do you calculate fixture design workload?

Divide the number of designs or revisions by completed designs per engineering hour, then multiply by one plus the allowance. For 26 designs at 1.5 per hour with an 18% allowance, base time is 17.33 hours and required time is 20.45 hours.

What is a typical fixture design rate?

It varies widely with complexity. Simple revisions might run several per hour; a complex multi-station fixture can take many hours each. The 1.5 designs per hour default reflects a mixed workload of moderate revisions.

Why add a review, ECO and tryout allowance?

Because a design is not complete at model release. Design review comments, engineering change orders and physical tryout corrections all consume engineering hours. An 18% allowance adds roughly 3 hours to a 17-hour base.

What is a good allowance percentage?

Mature teams on familiar parts often run 10-20%. New programs, new materials or heavy customer review cycles can push it to 30% or more. Track actuals and tune the allowance per program.

Fixture design workload vs lead time?

Workload is total engineering hours. Lead time is calendar duration, which depends on how many engineers are assigned and how much they parallelize. 20.45 hours could be two days for one engineer or one day split across two.

How do I convert required hours into headcount?

Divide required hours by the available engineering hours per person over your schedule window. 20.45 hours fits comfortably within one engineer-week, leaving room for other tasks.

Fixture, Gauge & Workholding Management calculator

Fixture Design Workload Calculator

Fixture design workload is the engineering time required to produce a batch of fixture designs or revisions, including the overhead of design reviews, engineering change orders and tryout support. Tooling team leads and engineering managers use it to size headcount, schedule a program's fixture deliverables, and quote design hours into a new job. Raw design throughput always understates the real number because a fixture is not done when the model is finished; it is done after review, ECO loops and physical tryout. Pricing that allowance honestly is what keeps a fixture program from slipping its dates.

What this calculator does

Estimate engineering hours required to design, review, detail, release, and support fixtures, gauges, jigs, nests, or workholding.
Use it when planning tooling engineer capacity, fixture design queues, launch support, or outsourced design packages.
It divides the number of fixture designs or revisions by the completed-designs-per-hour rate to get base hours, then inflates that by a review, ECO and tryout allowance to give the required design workload.

Formula used

Base fixture design workload time = fixture designs or revisions ÷ completed designs per engineering hour
Required fixture design workload time = base fixture design workload time × allowance factor

Inputs explained

Fixture designs or revisions:
Completed designs per engineering hour:
Review, ECO, and tryout allowance:

How to use the result

Use it when staffing a fixture design program, building a deliverables schedule, or quoting engineering hours for a tooling package.
It assumes one blended design rate; a mix of simple revisions and ground-up complex fixtures will be poorly served by a single number and should be split into separate runs.

Current U.S. benchmarks

The U.S. has 14,378 furniture and related products establishments employing about 355,594 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate fixture design workload? Divide the number of designs or revisions by completed designs per engineering hour, then multiply by one plus the allowance. For 26 designs at 1.5 per hour with an 18% allowance, base time is 17.33 hours and required time is 20.45 hours.
What is a typical fixture design rate? It varies widely with complexity. Simple revisions might run several per hour; a complex multi-station fixture can take many hours each. The 1.5 designs per hour default reflects a mixed workload of moderate revisions.
Why add a review, ECO and tryout allowance? Because a design is not complete at model release. Design review comments, engineering change orders and physical tryout corrections all consume engineering hours. An 18% allowance adds roughly 3 hours to a 17-hour base.
What is a good allowance percentage? Mature teams on familiar parts often run 10-20%. New programs, new materials or heavy customer review cycles can push it to 30% or more. Track actuals and tune the allowance per program.
Fixture design workload vs lead time? Workload is total engineering hours. Lead time is calendar duration, which depends on how many engineers are assigned and how much they parallelize. 20.45 hours could be two days for one engineer or one day split across two.

Last reviewed 2026-05-12.