Contract Manufacturing, Job Shop Quoting & Make-to-Order worked example

Job Shop Capacity at 90% expected shop uptime: a worked example

Push expected shop uptime up to 90% and the picture changes. This example computes every intermediate figure at that operating point. checking whether the shop can accept more RFQs, orders, or rush jobs in a capacity window

The inputs for this scenario

  • Parts per scheduled production slot: 24 parts / slot (unchanged)
  • Available production slots: 160 slots (unchanged)
  • Expected shop uptime: 90 % (raised for this scenario; the documented default is 78)
  • Expected first-pass yield: 94 % (unchanged)

Working through the calculation

  • Applying the documented formula (gross scheduled job-shop capacity = parts per scheduled production slot × available production slots) to the inputs above produces each figure below.
  • At this operating point the engine returns 3,249 parts for good job-shop capacity, the number this scenario is built around.
  • At this operating point the engine returns 3,840 parts for gross scheduled job-shop capacity.
  • At this operating point the engine returns 384 parts for capacity lost to uptime limits.
  • At this operating point the engine returns 207 parts for capacity lost to scrap and rework.

How this compares with the baseline

  • Against the tool's baseline example, where expected shop uptime sits at 78% and the headline result is 2,815 parts, this scenario comes in 15.38% above the baseline at 3,249 parts.
  • It computes good (sellable) job-shop capacity by multiplying gross scheduled capacity by expected uptime and first-pass yield, and breaks out the parts lost to each. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • good job-shop capacity: 3,249 parts (headline result)
  • gross scheduled job-shop capacity: 3,840 parts
  • capacity lost to uptime limits: 384 parts
  • capacity lost to scrap and rework: 207 parts

Run it with your numbers

  • Every input above is editable in the live Job Shop Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.