Oil, Gas & Energy Equipment Manufacturing worked example

Hydrotest Capacity at 99% test bay uptime: a worked example in oil, gas & energy equipment manufacturing

Push test bay uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when the hydrostatic test bay is being asked to take on more work and you need to know whether there is room before you promise a date.

The inputs for this scenario

  • Units tested per cycle: 4 units / cycle (unchanged)
  • Available test cycles: 480 cycles (unchanged)
  • Test bay uptime: 99 % (raised for this scenario; the documented default is 90)
  • First-pass test yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross hydrotest capacity = units tested per cycle × available test cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good hydrotest capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross hydrotest capacity.
  • At this operating point the engine returns 19.2 units for test bay downtime loss.
  • At this operating point the engine returns 57.02 units for retest and repair loss.

How this compares with the baseline

  • Against the tool's baseline example, where test bay uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • It computes good hydrotest throughput by multiplying gross capacity (units per cycle times available cycles) by test bay uptime and first-pass test yield. 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

  • Good hydrotest capacity: 1,844 units (headline result)
  • Gross hydrotest capacity: 1,920 units
  • Test bay downtime loss: 19.2 units
  • Retest and repair loss: 57.02 units

Run it with your numbers

  • Every input above is editable in the live Hydrotest Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.