CNC Machining worked example

CNC Batch Capacity at 99% expected machine uptime: a worked example

This scenario runs the cnc batch capacity calculation on the strong side: 99% expected machine uptime, with every other input held at its documented default. estimating CNC batch capacity for production planning, quoting, staffing, or automation review

The inputs for this scenario

  • Parts produced per machine cycle: 4 parts / cycle (unchanged)
  • Available CNC cycles in the window: 180 cycles (unchanged)
  • Expected machine uptime: 99 % (raised for this scenario; the documented default is 88)
  • First-pass yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross CNC batch capacity = parts per cycle × available CNC cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 691 parts for good cnc batch capacity, the number this scenario is built around.
  • At this operating point the engine returns 720 parts for gross cnc batch capacity.
  • At this operating point the engine returns 7.2 parts for cnc batch capacity loss from downtime.
  • At this operating point the engine returns 21.38 parts for cnc batch capacity loss from scrap or rework.

How this compares with the baseline

  • Against the tool's baseline example, where expected machine uptime sits at 88% and the headline result is 615 parts, this scenario comes in 12.5% above the baseline at 691 parts.
  • Use it when planning a production run or quoting a delivery date and you need a realistic good-part count, not an optimistic ceiling. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • good CNC batch capacity: 691 parts (headline result)
  • gross CNC batch capacity: 720 parts
  • CNC Batch Capacity loss from downtime: 7.2 parts
  • CNC Batch Capacity loss from scrap or rework: 21.38 parts

Run it with your numbers

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

Last reviewed 2026-05-12.