Cryogenic Storage & LNG Equipment worked example

Cryogenic Spare Parts Buffer with cryogenic spare inventory on hand of 3,000 parts: a worked example

Push cryogenic spare inventory on hand up to 3,000 parts and the picture changes. This example computes every intermediate figure at that operating point. Use it when cryogenic spare parts buffer in cryogenic storage and lng equipment is being sized for a buffer or safety stock review.

The inputs for this scenario

  • Cryogenic spare inventory on hand: 3,000 parts (raised for this scenario; the documented default is 1,200)
  • Average cryogenic spare usage: 85 parts / day (unchanged)
  • Supplier or repair lead-time safety factor: 1.1 factor (unchanged)

Working through the calculation

  • Applying the documented formula (Lead-time spare demand = average cryogenic spare usage × supplier or repair lead time) to the inputs above produces each figure below.
  • At this operating point the engine returns 32.09 parts for protected days of supply, the number this scenario is built around.
  • At this operating point the engine returns 35.29 days for unprotected days.
  • At this operating point the engine returns 3,000 pieces for inventory.
  • At this operating point the engine returns 85 pieces / day for daily usage.

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 150% above the baseline at 32.09 parts.
  • It computes protected days of supply from spare inventory on hand and average daily usage, scaled by a lead-time safety factor. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Protected days of supply: 32.09 parts (headline result)
  • Unprotected days: 35.29 days
  • Inventory: 3,000 pieces
  • Daily usage: 85 pieces / day

Run it with your numbers

  • Every input above is editable in the live Cryogenic Spare Parts Buffer calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.