Pump, Compressor & Rotating Equipment Assembly worked example

Hydraulic Efficiency at 68% target efficiency rate: a worked example

Suppose target efficiency rate falls to 68%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Hydraulic efficiency on a pump assembly line tracks what share of your built units fall into a flagged category — such as units failing the flow or head test versus the total run.

The inputs for this scenario

Rejected or affected units: 8 units (held at the documented default)
Total units inspected: 250 units (held at the documented default)
Target efficiency rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

The calculation starts from the formula this tool documents: Hydraulic Efficiency rate = affected amount ÷ total amount.
Rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
Gap to target works out to 64.8 points at these inputs.
Affected count works out to 8 count at these inputs.
Total count works out to 250 count at these inputs.

How this compares with the baseline

Against the tool's baseline example, where target efficiency rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
It divides affected units by total units to produce a percentage, then subtracts that rate from your target to show the gap in points. 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

Rate: 3.2 % (headline result)
Gap to target: 64.8 points
Affected count: 8 count
Total count: 250 count

Run it with your numbers

To rerun this with your own numbers, open the live Hydraulic Efficiency calculator, set target efficiency rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.