How do you calculate good-output capacity?

Multiply units per cycle by available cycles to get gross capacity, then multiply by uptime and by yield. In the default, 4 x 480 = 1,920 gross, then x 90% x 97% gives 1,676.16 good units.

What is the difference between gross and good capacity?

Gross capacity, 1,920 units here, assumes the line never stops and every unit passes. Good capacity, 1,676.16, is what you can actually ship after 192 units lost to downtime and about 51.84 lost to yield.

Is uptime or yield hurting me more?

Compare the two loss lines. Here uptime costs 192 units versus roughly 51.84 for yield, so downtime is nearly four times the drag. Fixing changeover and breakdown time returns more than chasing the last points of yield.

What is a good uptime for a trailer line?

Well-run fabrication and assembly lines run 85-92% availability; the 90% default is solid. Below 80% you usually have changeover, material-flow, or breakdown problems worth a focused Kaizen.

How does this relate to OEE?

This is a simplified OEE: uptime is availability and yield is quality. It omits the performance or speed-loss term, so treat the good-output figure as an optimistic OEE that assumes the line runs at rated cycle speed whenever it is up.

How do I convert cycles into a shift plan?

Set available cycles to the takt cycles in your planning window. At 480 cycles the model already reflects your shift structure, so scaling to a week or month is just multiplying available cycles accordingly.

Trailers, Truck Bodies & Specialty Vehicles calculator

Axle Assembly Line Capacity Calculator

This Axle Load Distribution capacity calculator projects the good, sellable output of a trailer or specialty-vehicle production line by discounting gross throughput for downtime and quality loss. Production planners and plant managers use it to commit realistic build volumes, spot the gap between nameplate and achievable output, and see whether uptime or yield is the bigger constraint. Nameplate capacity almost always overstates what a line delivers, and this model exposes that difference so you commit numbers you can actually ship. It multiplies cycle throughput by available cycles, then trims for real-world uptime and first-pass yield.

What this calculator does

This Axle Load Distribution capacity calculator projects the good, sellable output of a trailer or specialty-vehicle production line by discounting gross throughput for downtime and quality loss.
Use it when axle load distribution in trailers, truck bodies and specialty vehicles is being asked to take on more work and you need to know if there is room.
It multiplies units per cycle by available cycles for gross capacity, then multiplies by uptime and yield to give good-output capacity.

Formula used

Gross axle load distribution capacity = units per cycle × available cycles
Good capacity = gross capacity × uptime × yield

Inputs explained

Units built per production cycle:
Available production cycles:
Line uptime:
First-pass yield:

How to use the result

Use it when committing a production plan, sizing a line against a demand target, or diagnosing whether uptime or yield limits throughput.
It uses a single blended uptime and yield; a line with a chronic bottleneck station will not behave like this smooth average, so validate against actual station data.

Current U.S. benchmarks

On-highway diesel averages $6.20 per gallon this week (EIA), trending up over recent periods. Truck tonnage is down 0.4% year over year (BTS via FRED).
U.S. light vehicles sell at a 16.0 million annual rate (BEA, Sep 2026), down 3.6% from a year earlier, the volume signal for automotive supply chains.
Steel mill PPI stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. New factory orders are up 8.5% year over year (Census).
The U.S. has 11,691 transportation equipment establishments employing about 1,682,910 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate good-output capacity? Multiply units per cycle by available cycles to get gross capacity, then multiply by uptime and by yield. In the default, 4 x 480 = 1,920 gross, then x 90% x 97% gives 1,676.16 good units.
What is the difference between gross and good capacity? Gross capacity, 1,920 units here, assumes the line never stops and every unit passes. Good capacity, 1,676.16, is what you can actually ship after 192 units lost to downtime and about 51.84 lost to yield.
Is uptime or yield hurting me more? Compare the two loss lines. Here uptime costs 192 units versus roughly 51.84 for yield, so downtime is nearly four times the drag. Fixing changeover and breakdown time returns more than chasing the last points of yield.
What is a good uptime for a trailer line? Well-run fabrication and assembly lines run 85-92% availability; the 90% default is solid. Below 80% you usually have changeover, material-flow, or breakdown problems worth a focused Kaizen.
How does this relate to OEE? This is a simplified OEE: uptime is availability and yield is quality. It omits the performance or speed-loss term, so treat the good-output figure as an optimistic OEE that assumes the line runs at rated cycle speed whenever it is up.
How do I convert cycles into a shift plan? Set available cycles to the takt cycles in your planning window. At 480 cycles the model already reflects your shift structure, so scaling to a week or month is just multiplying available cycles accordingly.

Last reviewed 2026-08-12.