How do you calculate installation labor time?

Divide the install scope items by the crew completion rate to get base time, then multiply by the allowance factor. With 40 items at 0.05 items/min and a 30% allowance, base time is 800 min and required labor is 1040 min.

What does the rigging and tie-in allowance cover?

It accounts for crane and rigging setup, electrical and pneumatic tie-ins, alignment, and commissioning check-out that go beyond the raw set-in-place time. The 30% default reflects a typical install overhead.

How long does an MRF equipment install take?

It depends entirely on scope item count and crew rate. The example's 1040 crew-minutes is about 17.3 crew-hours; split across a four-person crew that's roughly a half-shift of clock time.

How do I size the crew for a shutdown window?

Divide required labor time by the available shutdown minutes to get the crew size needed. 1040 crew-minutes inside a 260-minute window needs four workers running in parallel.

Why is the completion rate so low?

At 0.05 items/min each item averages 20 minutes — realistic for heavy MRF components needing positioning, alignment, and fastening. Light items go faster; structural items go slower.

Does this include commissioning and testing?

Partially — the check-out portion of the allowance covers basic commissioning, but extended functional testing and re-teach should be estimated separately.

Municipal Waste Sorting Equipment calculator

Equipment Installation Labor Calculator

Installing or retrofitting MRF sorting equipment — conveyors, screens, optical sorters, ducting — is a labor-heavy job where schedule slips cost real money in extended downtime. This calculator turns a scope-item count and crew completion rate into the crew-minutes a job needs, then adds an allowance for rigging, utility tie-ins, and commissioning check-out. Project managers and integrators use it to bid installs and to plan shutdown windows. A defensible labor estimate keeps the commissioning date honest and the change-order risk down.

What this calculator does

Estimate millwright and electrician labor minutes for installing or replacing MRF sorting equipment, conveyors, screens, or balers.
Use it when scoping an installation outage for a new optical sorter, drum magnet, or screen, and you need a defensible labor estimate for the bid or the shutdown plan.
It computes total crew labor time to complete a set of install scope items, scaled by an allowance for rigging, tie-in, and check-out.

Formula used

Base installation labor time = install scope items / crew completion rate
Required installation labor time = base installation labor time x allowance factor

Inputs explained

Install scope items to set:
Items completed per minute by crew:
Rigging, tie-in, and check-out allowance:

How to use the result

Use it when bidding an equipment install or retrofit, or planning the labor inside a plant shutdown window.
It treats scope items as uniform; a heavy structural set and a quick bolt-on count the same, so break a mixed scope into separate runs for a credible estimate.

Current U.S. benchmarks

Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate installation labor time? Divide the install scope items by the crew completion rate to get base time, then multiply by the allowance factor. With 40 items at 0.05 items/min and a 30% allowance, base time is 800 min and required labor is 1040 min.
What does the rigging and tie-in allowance cover? It accounts for crane and rigging setup, electrical and pneumatic tie-ins, alignment, and commissioning check-out that go beyond the raw set-in-place time. The 30% default reflects a typical install overhead.
How long does an MRF equipment install take? It depends entirely on scope item count and crew rate. The example's 1040 crew-minutes is about 17.3 crew-hours; split across a four-person crew that's roughly a half-shift of clock time.
How do I size the crew for a shutdown window? Divide required labor time by the available shutdown minutes to get the crew size needed. 1040 crew-minutes inside a 260-minute window needs four workers running in parallel.
Why is the completion rate so low? At 0.05 items/min each item averages 20 minutes — realistic for heavy MRF components needing positioning, alignment, and fastening. Light items go faster; structural items go slower.

Last reviewed 2026-05-12.