Appliances, HVAC & White Goods Manufacturing worked example

Production Ramp Capacity Calculator at 90% expected ramp uptime: a worked example

What does the result look like when expected ramp uptime reaches 90%? The full calculation is worked below with real intermediate numbers. a program or operations manager needs a launch capacity estimate for an appliance or HVAC ramp

The inputs for this scenario

  • Units completed per ramp cycle: 1 units/cycle (unchanged)
  • Planned ramp production cycles: 1,350 cycles (unchanged)
  • Expected ramp uptime: 90 % (raised for this scenario; the documented default is 78)
  • Expected launch yield: 91 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross ramp unit capacity = units completed per ramp cycle × planned ramp production cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,106 units for expected good units during ramp, the number this scenario is built around.
  • At this operating point the engine returns 1,350 units for gross ramp unit capacity.
  • At this operating point the engine returns 135 units for units lost to ramp downtime.
  • At this operating point the engine returns 109 units for units lost to launch yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where expected ramp uptime sits at 78% and the headline result is 958 units, this scenario comes in 15.38% above the baseline at 1,106 units.
  • A figure at this level is achievable when expected ramp uptime is genuinely sustained, not just peaked for a shift. It applies single average uptime and yield figures across the whole ramp, so it won't capture the week-by-week improvement curve where early cycles run far worse than later ones.

Results at a glance

  • Expected good units during ramp: 1,106 units (headline result)
  • Gross ramp unit capacity: 1,350 units
  • Units lost to ramp downtime: 135 units
  • Units lost to launch yield loss: 109 units

Run it with your numbers

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

Last reviewed 2026-05-12.