EV Charging Infrastructure Manufacturing worked example

Demand Capacity Planner at 99% expected production uptime: a worked example

This scenario runs the demand capacity planner calculation on the strong side: 99% expected production uptime, with every other input held at its documented default. a planner needs to know whether charger production capacity covers customer or site demand

The inputs for this scenario

  • Chargers or ports produced per cycle: 10 units / cycle (unchanged)
  • Available production cycles for demand window: 180 cycles (unchanged)
  • Expected production uptime: 99 % (raised for this scenario; the documented default is 88)
  • Expected first-pass production yield: 93 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross demand-window capacity = chargers or ports per cycle × available production cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,657 units for good charger capacity available to demand, the number this scenario is built around.
  • At this operating point the engine returns 1,800 units for gross demand-window charger capacity.
  • At this operating point the engine returns 18 units for capacity lost to downtime before demand date.
  • At this operating point the engine returns 125 units for capacity lost to defects, retest, or rework.

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 12.5% above the baseline at 1,657 units.
  • Use it when committing delivery dates for a charger program, deciding whether existing cycles cover demand, or sizing the gap before adding capacity. 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 charger capacity available to demand: 1,657 units (headline result)
  • Gross demand-window charger capacity: 1,800 units
  • Capacity lost to downtime before demand date: 18 units
  • Capacity lost to defects, retest, or rework: 125 units

Run it with your numbers

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

Last reviewed 2026-05-12.