EV Charging Infrastructure Manufacturing worked example
Service Parts Buffer with usable service-parts inventory of 480 parts: a worked example in ev charging infrastructure manufacturing
Suppose usable service-parts inventory falls to 480 parts. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate protected days of supply for EV charger service parts from usable inventory, daily demand, and service-risk multiplier.
The inputs for this scenario
- Usable service-parts inventory: 480 parts (the input this scenario stresses; the baseline uses 960)
- Average daily service demand: 24 parts / day (held at the documented default)
- Service criticality risk multiplier: 1.25 x (held at the documented default)
Working through the calculation
- The calculation starts from the formula this tool documents: Protected service-parts days = usable service-parts inventory ÷ average daily service demand ÷ service criticality risk multiplier.
- Protected service-parts days of supply works out to 16 days at these inputs, and this is the headline figure for the scenario.
- Unadjusted service-parts days of supply works out to 20 days at these inputs.
- Usable service-parts inventory works out to 480 parts at these inputs.
- Average daily service demand works out to 24 parts / day at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where usable service-parts inventory sits at 960 parts and the headline result is 32 days, this scenario comes in 50% below the baseline at 16 days.
- It computes risk-adjusted protected days of supply by dividing usable service-parts inventory by average daily demand, then dividing by a criticality multiplier that shortens the horizon for high-risk parts. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.
Results at a glance
- Protected service-parts days of supply: 16 days (headline result)
- Unadjusted service-parts days of supply: 20 days
- Usable service-parts inventory: 480 parts
- Average daily service demand: 24 parts / day
Run it with your numbers
- To rerun this with your own numbers, open the live Service Parts Buffer calculator, set usable service-parts inventory to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.