How do you calculate good headcount capacity?

Multiply output per cycle by available cycles, then by uptime and yield as decimals. Here 120 x 40 x 0.90 x 0.97 = 4,190.4 good units.

What is the difference between gross and good capacity?

Gross is the theoretical maximum (120 x 40 = 4,800 in the example); good is what survives downtime and yield losses, here 4,190.4. The 609.6 gap is the loss you can attack.

How much capacity does downtime cost in this example?

At 90% uptime, downtime removes 480 units from the 4,800 gross figure before yield is even applied.

How much does yield cost in this example?

After downtime, 97% first-pass yield scraps 129.6 units, the difference between the post-uptime figure and the 4,190.4 good result.

Should I quote customers from gross or good capacity?

Always quote from good capacity. Promising the 4,800 gross figure ignores the 609.6 units lost to downtime and scrap and sets you up to miss the date.

What is a good uptime and yield to target?

World-class lines aim for uptime above 90% and first-pass yield above 99%. The example 90% uptime and 97% yield leave clear room to recover the 609.6-unit gap.

Safety & Workforce calculator

Headcount Capacity Calculator

Headcount capacity is the realistic saleable output a staffed line can deliver once you discount for downtime and yield losses, rather than the theoretical maximum on the nameplate. Production planners and value-stream managers use it to promise credible dates, size crews, and expose where losses hide between gross and good output. Quoting from gross capacity is how plants overcommit and miss ship dates; this calculator forces uptime and first-pass yield into the number so the answer reflects what actually reaches the dock. It also breaks out the downtime and yield losses so you know which lever to pull.

What this calculator does

Estimate good labor capacity from crew size, available shifts, uptime, and yield.
Use it when headcount capacity in safety and workforce is being asked to take on more work and you need to know if there is room.
It multiplies output per cycle by available cycles, then derates by uptime and yield to give good (saleable) capacity, and separately reports the downtime and yield losses.

Formula used

Good capacity = cycle capacity × available cycles × uptime × yield

Inputs explained

Good output per staffed cycle:
Available production cycles:
Line uptime:
First-pass yield:

How to use the result

Use it when committing capacity to a customer, comparing crewing scenarios, or quantifying what a reliability or quality improvement is worth in output.
It assumes uptime and yield are stable averages; a line with high variability or a chronic bottleneck station may deliver less than the smooth math predicts.

Current U.S. benchmarks

Manufacturing hourly earnings average $30.27 (BLS, Jun 2026), up 4.4% from a year earlier. Median machinist pay is $28.24/hr (OEWS 2025), with state medians on each state page. Manufacturers have 529k open positions nationally (BLS JOLTS).

Common questions

How do you calculate good headcount capacity? Multiply output per cycle by available cycles, then by uptime and yield as decimals. Here 120 x 40 x 0.90 x 0.97 = 4,190.4 good units.
What is the difference between gross and good capacity? Gross is the theoretical maximum (120 x 40 = 4,800 in the example); good is what survives downtime and yield losses, here 4,190.4. The 609.6 gap is the loss you can attack.
How much capacity does downtime cost in this example? At 90% uptime, downtime removes 480 units from the 4,800 gross figure before yield is even applied.
How much does yield cost in this example? After downtime, 97% first-pass yield scraps 129.6 units, the difference between the post-uptime figure and the 4,190.4 good result.
Should I quote customers from gross or good capacity? Always quote from good capacity. Promising the 4,800 gross figure ignores the 609.6 units lost to downtime and scrap and sets you up to miss the date.

Last reviewed 2026-05-12.