Contract Manufacturing, Job Shop Quoting & Make-to-Order calculator
Job Shop Capacity Calculator
Use this calculator to convert parts per production slot, available slots, uptime, and first-pass yield into practical good-part capacity for custom work.
What this calculator does
- Estimate good-part capacity for a job shop or make-to-order work center.
- checking whether the shop can accept more RFQs, orders, or rush jobs in a capacity window
- The result estimates good parts the shop can deliver in the selected capacity window.
Formula used
- gross scheduled job-shop capacity = parts per scheduled production slot × available production slots
- good job-shop capacity = gross scheduled job-shop capacity × expected shop uptime × expected first-pass yield
Inputs explained
- parts per scheduled production slot: Use demonstrated output for the work center, machine group, bench, fixture, or assembly cell serving this job family.
- available production slots: Use slots available after booked backlog, planned maintenance, setups, holidays, training, and committed customer orders.
- expected shop uptime: Use realistic uptime after machine downtime, operator availability, material readiness, and changeover disruption.
- expected first-pass yield: Use yield from similar materials, tolerances, customers, inspection requirements, and routing complexity.
How to use the result
- Use it to accept work, quote lead times, add shifts, outsource operations, or protect critical customer commitments.
- Treat the result as an estimate until the RFQ package, customer drawing revision, material quote, routing, setup standard, shop rate, outside service quote, scrap history, open capacity, due date, and quoted commercial terms are confirmed for the same job, lot size, and customer order.
Common questions
- What is the job shop capacity calculator for? Use this calculator to convert parts per production slot, available slots, uptime, and first-pass yield into practical good-part capacity for custom work.
- What information should I enter? Enter parts per scheduled production slot, available production slots, expected shop uptime, and expected first-pass yield from the same RFQ, customer order, routing, capacity window, or quote scenario.
- What does the result tell me? The result estimates good parts the shop can deliver in the selected capacity window.
- When is the result only an estimate? Treat the result as an estimate until the RFQ package, customer drawing revision, material quote, routing, setup standard, shop rate, outside service quote, scrap history, open capacity, due date, and quoted commercial terms are confirmed for the same job, lot size, and customer order.
Last reviewed 2026-05-12.