Contract Manufacturing, Job Shop Quoting & Make-to-Order calculator

Make-to-Order Lead Time Calculator

Use this calculator to convert routing workload and expected completion pace into required lead time after setup, queue, inspection, and handoff allowances.

What this calculator does

  • Estimate lead time hours for a make-to-order job routing.
  • promising due dates for customer-specific jobs before releasing the order
  • The result estimates the lead time hours needed for the quoted order.

Formula used

  • base routing lead time = routing operation count for the order ÷ routing completion pace
  • required make-to-order lead time = base routing lead time × (1 + queue, setup, inspection, and handoff allowance)

Inputs explained

  • routing operation count for the order: Count programming, setup, machining, fabrication, assembly, inspection, outside processing handoffs, and pack-out steps that drive lead time.
  • routing completion pace: Use demonstrated completion pace from similar part families, staffing levels, machine groups, and shift patterns.
  • queue, setup, inspection, and handoff allowance: Include expected waiting time for material release, programming review, first article, outside service, customer approvals, and shipping prep.

How to use the result

  • Use it to promise dates, set expedite premiums, identify bottleneck steps, and decide whether the job can fit the schedule.
  • 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 make-to-order lead time calculator for? Use this calculator to convert routing workload and expected completion pace into required lead time after setup, queue, inspection, and handoff allowances.
  • What information should I enter? Enter routing operation count for the order, routing completion pace, and queue, setup, inspection, and handoff allowance from the same RFQ, routing, estimating workflow, or make-to-order production plan.
  • What does the result tell me? The result estimates the lead time hours needed for the quoted order.
  • 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.