Hospital Equipment & Clinical Furniture worked example

Spare Parts Inventory with average daily spare parts consumption of 6 units / day: a worked example in hospital equipment & clinical furniture

Here is what the math looks like when conditions slip. We hold every other input steady and drop average daily spare parts consumption to 6 units / day, then walk the calculation through step by step. Estimate the spare parts inventory level needed to support hospital equipment production and service without stockouts, based on daily consumption, warehouse lead time, and safety stock.

The inputs for this scenario

  • Average daily spare parts consumption (casters, actuators, gas struts): 6 units / day (the input this scenario stresses; the baseline uses 12)
  • Warehouse or supplier lead time: 14 days (held at the documented default)
  • Safety stock for demand variation: 50 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Cycle stock = average daily consumption × warehouse or supplier lead time.
  • Protected days of supply works out to 0.01 days at these inputs, and this is the headline figure for the scenario.
  • Unprotected days works out to 0.43 days at these inputs.
  • Inventory works out to 6 pieces at these inputs.
  • Daily usage works out to 14 pieces / day at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where average daily spare parts consumption sits at 12 units / day and the headline result is 0.02 days, this scenario comes in 50% below the baseline at 0.01 days.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to average daily spare parts consumption, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes steady average daily consumption and a fixed lead time — for parts with lumpy, seasonal, or recall-driven demand spikes you need a statistical safety-stock model, not a flat buffer.

Results at a glance

  • Protected days of supply: 0.01 days (headline result)
  • Unprotected days: 0.43 days
  • Inventory: 6 pieces
  • Daily usage: 14 pieces / day

Run it with your numbers

  • To rerun this with your own numbers, open the live Spare Parts Inventory calculator, set average daily spare parts consumption to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.