Check Factory Capacity Before Giving a Lead Time

A factory calendar is not the same as available capacity. A line may be open on paper but need a fixture, trained operator, maintenance window or quality resource. Before sales gives a firm production date, planning should check the actual routing for the quoted product and the orders already committed to that equipment.

Ask for the next feasible slot

Record the process sequence, setup time, expected run time, inspection requirement and any external operation. Ask whether a slot is reserved or merely estimated. If the product requires a shared bottleneck, use that operation to test the schedule. Do not calculate a lead time by adding only the time the machine physically runs.

State the capacity position in the quote with care. “Planned start subject to order acceptance and capacity confirmation” is not the same as a held slot. If a reservation expires, put that date in the internal planning record and communicate any change before the buyer relies on the earlier estimate.

After the order arrives, compare the promised milestone with the current production plan. If a higher-priority job has displaced it, escalate and revise the buyer's schedule promptly. An honest correction is more useful than a date that becomes impossible in silence.

Worked example (illustrative)

A machine appears free next week, but the inspection fixture is committed elsewhere. Planning records the fixture as the bottleneck and gives sales the earliest supported slot. The buyer receives a conditional target until that slot is held, rather than a date based only on an open machine calendar.

Source check

Checked 2026-09-28. NIST MEP scheduling case shows capacity-constrained work-center scheduling being used to improve lead-time estimates. The linked source supports this point only. The steps and worked example above are editorial guidance; they do not establish any supplier’s capability or guarantee a buyer response, order or delivery.

Evidence and use boundary

Editorial method reviewed: 2026-09-27. This article is an operational checklist, not a report of current market conditions or a claim about any particular factory, buyer, certification or delivery result. Check the current product and transaction records before acting.