Hospital Equipment & Clinical Furniture worked example

Field Service Buffer with average daily service-parts consumption of 4 units / day: a worked example in hospital equipment & clinical furniture

Suppose average daily service-parts consumption falls to 4 units / day. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate the field service parts buffer needed to support hospital equipment service calls without waiting on supplier replenishment, based on daily consumption, supplier lead time, and safety stock.

The inputs for this scenario

  • Average daily service-parts consumption: 4 units / day (the input this scenario stresses; the baseline uses 8)
  • Supplier replenishment lead time: 21 days (held at the documented default)
  • Safety stock buffer: 40 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Cycle stock = average daily consumption × supplier lead time.
  • Protected days of supply works out to 0 days at these inputs, and this is the headline figure for the scenario.
  • Unprotected days works out to 0.19 days at these inputs.
  • Inventory works out to 4 pieces at these inputs.
  • Daily usage works out to 21 pieces / day at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where average daily service-parts consumption sits at 8 units / day and the headline result is 0.01 days, this scenario comes in 50% below the baseline at 0 days.
  • It sizes the total field-service spare buffer as cycle stock — average daily consumption times supplier lead time — plus a safety-stock cushion. 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 days of supply: 0 days (headline result)
  • Unprotected days: 0.19 days
  • Inventory: 4 pieces
  • Daily usage: 21 pieces / day

Run it with your numbers

  • To rerun this with your own numbers, open the live Field Service Buffer calculator, set average daily service-parts consumption to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.