Does availability act before yield?

Availability acts first: the bench runs only part of the shift, so the gross count is cut before any valve is tested. Yield then applies to the valves that actually ran, which is why the two losses multiply rather than add.

What counts as first-pass yield here?

Valves that pass every pressure and leak check on the first attempt, without rework or a second cycle. A valve that fails once and passes after rework lowers the yield, because the bench time was already spent.

How do I get a realistic availability figure?

Divide actual bench run time by planned production time over several shifts, from the run log or OEE record. One good shift overstates availability; a breakdown shift understates it, so use a period that includes both.

Why is the fixture count separate from cycles?

A fixture tests several valves at once, so the gross count is valves per cycle times cycles per shift. Changing the fixture size changes the count without changing the number of pressure cycles the bench runs.

Industrial Valves, Actuators & Flow Control calculator

Pressure Test Throughput Calculator

Work out how many valves a test bench passes in a shift after downtime and first-test failures, and check the count against your target. Enter the fixture count, cycles, availability and yield.

What this calculator does

Passed valves per shift from bench availability and first-pass yield, with both losses and the gap to target.

Formula used

Gross throughput = valves per cycle × test cycles per shift
Bench output = gross throughput × bench availability ÷ 100
Passed valves = bench output × first-pass yield ÷ 100
Downtime loss = gross − bench output; failure loss = bench output − passed
Gap to target = passed valves − target passed valves

Inputs explained

Valves per Test Cycle: Valves loaded into the fixture for one pressure cycle.
Test Cycles per Shift: Pressure cycles the bench can complete in the shift.
Test Bench Availability: Share of planned shift time the bench runs.
First-Pass Test Yield: Share of tested valves that pass the first cycle.
Target Passed Valves per Shift: Passed valves the shift is expected to deliver.

How to use the result

Best suited to sizing a shift against a pass target, choosing between a larger fixture and more cycles, seeing which loss costs the most valves.
Availability and yield are shift averages, so a single breakdown or failure cluster is not timed. The model stops at passed valves and does not schedule the retest of failed valves.

Current U.S. benchmarks

The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

Does availability act before yield? Availability acts first: the bench runs only part of the shift, so the gross count is cut before any valve is tested. Yield then applies to the valves that actually ran, which is why the two losses multiply rather than add.
What counts as first-pass yield here? Valves that pass every pressure and leak check on the first attempt, without rework or a second cycle. A valve that fails once and passes after rework lowers the yield, because the bench time was already spent.
How do I get a realistic availability figure? Divide actual bench run time by planned production time over several shifts, from the run log or OEE record. One good shift overstates availability; a breakdown shift understates it, so use a period that includes both.
Why is the fixture count separate from cycles? A fixture tests several valves at once, so the gross count is valves per cycle times cycles per shift. Changing the fixture size changes the count without changing the number of pressure cycles the bench runs.

Last reviewed 2026-10-01.