CMMS, EAM & Spare Parts Management worked example

Spare Part Reorder Point at 94% service-level and safety-stock factor: a worked example

This worked example runs the spare part reorder point numbers for a tougher week than the baseline: 94% service-level and safety-stock factor instead of the typical 130%. Estimate a reorder point using daily spare-parts demand, lead time, service-level buffer, and inventory accuracy confidence.

The inputs for this scenario

  • average spare part demand per day: 2.4 parts / day (held at the documented default)
  • supplier lead time: 28 cycles (held at the documented default)
  • service-level and safety-stock factor: 94 % (the input this scenario stresses; the baseline uses 130)
  • inventory accuracy confidence: 96 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross spare part reorder point = average spare part demand per day × supplier lead time.
  • Usable spare part reorder point works out to 60.64 units at these inputs, and this is the headline figure for the scenario.
  • Gross spare part reorder point works out to 67.2 units at these inputs.
  • Spare Part Reorder Point loss from availability or service-factor limits works out to 4.03 units at these inputs.
  • Spare Part Reorder Point loss from data, accuracy, or acceptance gaps works out to 2.53 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where service-level and safety-stock factor sits at 130% and the headline result is 83.87 units, this scenario comes in 27.69% below the baseline at 60.64 units.
  • Use it when setting or auditing reorder points in a CMMS/EAM where stockroom accuracy and service-level targets meaningfully shift the effective trigger. 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

  • Usable spare part reorder point: 60.64 units (headline result)
  • Gross spare part reorder point: 67.2 units
  • Spare Part Reorder Point loss from availability or service-factor limits: 4.03 units
  • Spare Part Reorder Point loss from data, accuracy, or acceptance gaps: 2.53 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Spare Part Reorder Point calculator, set service-level and safety-stock factor to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.