Outdoor Power Equipment worked example

Production Ramp Planner at 54% ramp-phase line uptime: a worked example in outdoor power equipment

This worked example runs the production ramp planner numbers for a tougher week than the baseline: 54% ramp-phase line uptime instead of the typical 75%. Estimate buildable units during a launch ramp from daily output, ramp days, ramp-phase uptime, and ramp-phase first-pass yield.

The inputs for this scenario

  • Units built per day at ramp rate: 120 units / day (held at the documented default)
  • Ramp build days: 30 days (held at the documented default)
  • Ramp-phase line uptime: 54 % (the input this scenario stresses; the baseline uses 75)
  • Ramp-phase first-pass yield: 88 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross ramp build = units built per day at ramp rate × ramp build days.
  • Good units buildable during ramp works out to 1,711 units at these inputs, and this is the headline figure for the scenario.
  • Gross ramp build works out to 3,600 units at these inputs.
  • Ramp downtime loss works out to 1,656 units at these inputs.
  • Ramp yield loss works out to 233 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where ramp-phase line uptime sits at 75% and the headline result is 2,376 units, this scenario comes in 28% below the baseline at 1,711 units.
  • Use it during new-product launch or seasonal ramp planning to size the achievable build before the line reaches mature takt time and yield. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Good units buildable during ramp: 1,711 units (headline result)
  • Gross ramp build: 3,600 units
  • Ramp downtime loss: 1,656 units
  • Ramp yield loss: 233 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Production Ramp Planner calculator, set ramp-phase line uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.