Foundry & Forging worked example

Core Making Capacity at 99% core machine availability: a worked example

This scenario runs the core making capacity calculation on the strong side: 99% core machine availability, with every other input held at its documented default. Use it when core room output must match mold demand, pouring schedule, or customer lots.

The inputs for this scenario

  • Cores per machine cycle: 4 cores / cycle (unchanged)
  • Available coremaking cycles: 420 cycles (unchanged)
  • Core machine availability: 99 % (raised for this scenario; the documented default is 86)
  • Accepted core yield: 95 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross core making capacity = cores per machine cycle × available coremaking cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,580 units for good core making capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,680 units for gross core making capacity.
  • At this operating point the engine returns 16.8 units for core making capacity downtime loss.
  • At this operating point the engine returns 83.16 units for core making capacity reject or rework loss.

How this compares with the baseline

  • Against the tool's baseline example, where core machine availability sits at 86% and the headline result is 1,373 units, this scenario comes in 15.12% above the baseline at 1,580 units.
  • Use it during line balancing, new-program ramp planning, or when a molding line is waiting on cores and you need to know whether the core room can keep up. 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 core making capacity: 1,580 units (headline result)
  • Gross core making capacity: 1,680 units
  • Core Making Capacity downtime loss: 16.8 units
  • Core Making Capacity reject or rework loss: 83.16 units

Run it with your numbers

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

Last reviewed 2026-05-12.