Cryogenic Storage & LNG Equipment worked example

Cryogenic Spare Parts Buffer with cryogenic spare inventory on hand of 600 parts: a worked example

This worked example runs the cryogenic spare parts buffer numbers for a tougher week than the baseline: cryogenic spare inventory on hand of 600 parts instead of the typical 1,200 parts. Calculate spare-parts inventory needed to cover cryogenic equipment usage through supplier lead time plus safety stock.

The inputs for this scenario

  • Cryogenic spare inventory on hand: 600 parts (the input this scenario stresses; the baseline uses 1,200)
  • Average cryogenic spare usage: 85 parts / day (held at the documented default)
  • Supplier or repair lead-time safety factor: 1.1 factor (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Lead-time spare demand = average cryogenic spare usage × supplier or repair lead time.
  • Protected days of supply works out to 6.42 parts 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 cryogenic spare inventory on hand sits at 1,200 parts and the headline result is 12.83 parts, this scenario comes in 50% below the baseline at 6.42 parts.
  • Use it when setting reorder points for cryogenic spares, reviewing stock for long-lead critical items, or stress-testing inventory against a supplier delay. 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

  • Protected days of supply: 6.42 parts (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 Cryogenic Spare Parts Buffer calculator, set cryogenic spare inventory on hand to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.