EV Charging Infrastructure Manufacturing worked example

Demand Capacity Planner at 63% expected production uptime: a worked example

This worked example runs the demand capacity planner numbers for a tougher week than the baseline: 63% expected production uptime instead of the typical 88%. Estimate good charger production capacity available to cover site, fleet, or customer demand.

The inputs for this scenario

  • Chargers or ports produced per cycle: 10 units / cycle (held at the documented default)
  • Available production cycles for demand window: 180 cycles (held at the documented default)
  • Expected production uptime: 63 % (the input this scenario stresses; the baseline uses 88)
  • Expected first-pass production yield: 93 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross demand-window capacity = chargers or ports per cycle × available production cycles.
  • Good charger capacity available to demand works out to 1,055 units at these inputs, and this is the headline figure for the scenario.
  • Gross demand-window charger capacity works out to 1,800 units at these inputs.
  • Capacity lost to downtime before demand date works out to 666 units at these inputs.
  • Capacity lost to defects, retest, or rework works out to 79.38 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where expected production uptime sits at 88% and the headline result is 1,473 units, this scenario comes in 28.41% below the baseline at 1,055 units.
  • Use it when committing delivery dates for a charger program, deciding whether existing cycles cover demand, or sizing the gap before adding capacity. 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 charger capacity available to demand: 1,055 units (headline result)
  • Gross demand-window charger capacity: 1,800 units
  • Capacity lost to downtime before demand date: 666 units
  • Capacity lost to defects, retest, or rework: 79.38 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Demand Capacity Planner calculator, set expected production uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.