Mining Vehicle & Underground Equipment worked example

Field Service Buffer with field consumption rate per machine-day of 600 units / day: a worked example in mining vehicle & underground equipment

Suppose field consumption rate per machine-day falls to 600 units / day. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate field service buffer for mining vehicle and underground equipment using production-ready inputs so teams can plan replenishment and safety stock using actual usage and lead time.

The inputs for this scenario

  • Field consumption rate per machine-day: 600 units / day (the input this scenario stresses; the baseline uses 1,200)
  • Resupply lead time to the pit or portal: 85 days (held at the documented default)
  • Safety stock multiplier on lead-time demand: 1.1 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Field service buffer cycle stock = field service buffer daily usage × field service buffer lead time.
  • Protected days of supply works out to 6.42 days at these inputs, and this is the headline figure for the scenario.
  • Unprotected days works out to 7.06 days at these inputs.
  • Inventory works out to 600 pieces at these inputs.
  • Daily usage works out to 85 pieces / day at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where field consumption rate per machine-day sits at 1,200 units / day and the headline result is 12.83 days, this scenario comes in 50% below the baseline at 6.42 days.
  • It computes cycle stock from daily usage times lead time, adds a safety-stock multiplier, and reports how many days of supply that protects against. 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: 6.42 days (headline result)
  • Unprotected days: 7.06 days
  • Inventory: 600 pieces
  • Daily usage: 85 pieces / day

Run it with your numbers

  • To rerun this with your own numbers, open the live Field Service Buffer calculator, set field consumption rate per machine-day to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.