How do you calculate good production capacity?

Multiply output per cycle by scheduled cycles to get gross capacity, then multiply by uptime and first-pass yield. With 120 good units/cycle over 42 cycles at 88% uptime and 96% yield, gross is 5,040 and good capacity is about 4,258 units.

What is the difference between gross and good capacity?

Gross capacity assumes the work center runs every scheduled cycle and every unit passes. Good capacity removes planned downtime and expected scrap. Here gross is 5,040 but good is 4,258 — roughly 782 units evaporate to availability and yield losses.

Why is my actual output lower than scheduled capacity?

Usually because the schedule was built on gross numbers. In this example, 605 units are lost to downtime and availability and 177 to scrap or rework. If you scheduled to 5,040 instead of 4,258, you would be 782 units short before the week even started.

How does first-pass yield affect capacity planning?

Yield is a direct multiplier on good output. Dropping first-pass yield from 96% to 90% on this line would cut good capacity by about 266 units, because every reject consumes a cycle but produces nothing saleable.

What is a good uptime percentage for a work center?

It depends on the equipment, but 85-90% planned availability is typical for a well-run discrete work center after maintenance, changeovers and breaks. The 88% used here is realistic; chasing 95%+ usually means you are hiding losses in the gross number.

Should I schedule to gross or good capacity?

Always schedule to good capacity. Gross is a theoretical ceiling. Committing 4,258 units keeps the promise achievable; committing 5,040 guarantees you fall short by the 782 units lost to downtime and scrap.

ERP & MRP Planning calculator

Production Schedule Capacity Calculator

Good scheduled production capacity is the realistic quantity of saleable units a work center will actually produce once planned downtime and expected scrap are taken out of the theoretical maximum. It is the number schedulers should commit to a customer, not the optimistic gross figure that assumes perfect uptime and zero defects. Production planners and operations managers use it to set achievable schedules and to expose the gap between nameplate capacity and real throughput. Promising gross capacity is how shops end up chronically late and over-promised.

What this calculator does

Estimate good production output from scheduled cycles, units per cycle, uptime, and first-pass yield.
a production scheduler needs to confirm whether scheduled capacity covers the build plan
It derates gross scheduled capacity by expected uptime and expected first-pass yield to give the good-unit output you can realistically commit.

Formula used

Gross scheduled capacity = good units per cycle × scheduled production cycles
Good scheduled capacity = gross capacity × expected uptime × expected first-pass yield

Inputs explained

Good units per production cycle:
Scheduled production cycles:
Expected work-center uptime:
Expected first-pass yield:

How to use the result

Use it when building a production schedule, sizing a line against a demand quantity, or quoting a delivery date that has to hold.
It uses single planning factors for uptime and yield — it does not model variability, learning curves, changeover stacking, or correlated failures, so a bad week can still fall short of the derated number.

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).
U.S. manufacturing runs at 75.6% of capacity (Federal Reserve, May 2026). New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate good production capacity? Multiply output per cycle by scheduled cycles to get gross capacity, then multiply by uptime and first-pass yield. With 120 good units/cycle over 42 cycles at 88% uptime and 96% yield, gross is 5,040 and good capacity is about 4,258 units.
What is the difference between gross and good capacity? Gross capacity assumes the work center runs every scheduled cycle and every unit passes. Good capacity removes planned downtime and expected scrap. Here gross is 5,040 but good is 4,258 — roughly 782 units evaporate to availability and yield losses.
Why is my actual output lower than scheduled capacity? Usually because the schedule was built on gross numbers. In this example, 605 units are lost to downtime and availability and 177 to scrap or rework. If you scheduled to 5,040 instead of 4,258, you would be 782 units short before the week even started.
How does first-pass yield affect capacity planning? Yield is a direct multiplier on good output. Dropping first-pass yield from 96% to 90% on this line would cut good capacity by about 266 units, because every reject consumes a cycle but produces nothing saleable.
What is a good uptime percentage for a work center? It depends on the equipment, but 85-90% planned availability is typical for a well-run discrete work center after maintenance, changeovers and breaks. The 88% used here is realistic; chasing 95%+ usually means you are hiding losses in the gross number.

Last reviewed 2026-05-12.