Bicycles, E-Bikes & Micromobility worked example

Service Parts Buffer with daily service parts demand of 19 parts / day: a worked example in bicycles, e-bikes & micromobility

Suppose daily service parts demand falls to 19 parts / day. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate service parts inventory needed for bicycle, e-bike, scooter, or fleet repairs from daily demand, replenishment lead time, and safety stock.

The inputs for this scenario

  • Daily service parts demand: 19 parts / day (the input this scenario stresses; the baseline uses 38)
  • Supplier replenishment lead time: 21 days (held at the documented default)
  • Service parts safety stock: 250 parts (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Parts covering replenishment lead time = daily service parts demand × supplier replenishment lead time.
  • Protected days of supply works out to 0 service parts at these inputs, and this is the headline figure for the scenario.
  • Unprotected days works out to 0.9 days at these inputs.
  • Inventory works out to 19 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 daily service parts demand sits at 38 parts / day and the headline result is 0.01 service parts, this scenario comes in 50% below the baseline at 0 service parts.
  • It computes the required service parts inventory as lead-time demand 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 service parts (headline result)
  • Unprotected days: 0.9 days
  • Inventory: 19 pieces
  • Daily usage: 21 pieces / day

Run it with your numbers

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

Last reviewed 2026-05-12.