Maintenance & Reliability worked example

Downtime Cost per Event with downtime hours for the event of 15 hr: a worked example

Push downtime hours for the event up to 15 hr and the picture changes. This example computes every intermediate figure at that operating point. Use it during RCA or major breakdown review when one failure event needs a full economic value.

The inputs for this scenario

  • Downtime hours for the event: 15 hr (raised for this scenario; the documented default is 6)
  • Downtime cost per hour: 11,200 $ / hr (unchanged)
  • Repair parts and labor cost: 8,500 $ (unchanged)
  • Ramp-up loss and penalty cost: 5,500 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Event downtime loss = downtime hours for the event × downtime cost per hour) to the inputs above produces each figure below.
  • At this operating point the engine returns 182,000 $ / event for downtime event cost, the number this scenario is built around.
  • At this operating point the engine returns 12,133 $ / hr for cost per downtime hour.
  • At this operating point the engine returns 168,000 $ for event downtime loss.
  • At this operating point the engine returns 14,000 $ for repair and recovery cost.

How this compares with the baseline

  • Against the tool's baseline example, where downtime hours for the event sits at 6 hr and the headline result is 81,200 $ / event, this scenario comes in 124% above the baseline at 182,000 $ / event.
  • It sums lost-production cost (downtime hours times cost per hour) with repair parts and labor and any ramp-up loss or contractual penalty to give the total cost of one downtime event. 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

  • Downtime Event Cost: 182,000 $ / event (headline result)
  • Cost per Downtime Hour: 12,133 $ / hr
  • Event Downtime Loss: 168,000 $
  • Repair and Recovery Cost: 14,000 $

Run it with your numbers

  • Every input above is editable in the live Downtime Cost per Event calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.