CNC Machining worked example

CNC Utilization at 86% target cnc utilization: a worked example

This scenario runs the cnc utilization calculation on the strong side: 86% target cnc utilization, with every other input held at its documented default. reviewing machine loading, capacity, OEE discussions, or whether another machining center is needed

The inputs for this scenario

  • productive CNC machine time: 118 hr (unchanged)
  • available CNC machine time: 160 hr (unchanged)
  • target CNC utilization: 86 % (raised for this scenario; the documented default is 75)

Working through the calculation

  • Applying the documented formula (CNC utilization = productive CNC machine time ÷ available CNC machine time × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 73.75 % utilized for cnc utilization, the number this scenario is built around.
  • At this operating point the engine returns 12.25 points for utilization gap to target.
  • At this operating point the engine returns 118 count for productive cnc machine time.
  • At this operating point the engine returns 160 count for available cnc machine time.

How this compares with the baseline

  • Against the tool's baseline example, where target cnc utilization sits at 75% and the headline result is 73.75 % utilized, this scenario lands almost exactly on the baseline at 73.75 % utilized.
  • Use it for capacity planning, before justifying a new machine purchase, and to track whether scheduling or setup improvements are increasing spindle time. 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

  • CNC utilization: 73.75 % utilized (headline result)
  • utilization gap to target: 12.25 points
  • productive CNC machine time: 118 count
  • available CNC machine time: 160 count

Run it with your numbers

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

Last reviewed 2026-05-12.