Why are the two losses derated in sequence, not added?

Station downtime removes gross cycles, and test failures can only remove machines that actually reached the stand. Multiplying yield by the uptime share keeps the failure loss from double counting downtime.

What counts as a test cycle on this page?

One complete pass through the stand for its full batch of machines. Partial cycles, retests and setup are excluded or counted separately before you enter the available cycles.

Is first-pass yield the same as the test log pass rate?

Use the share of machines that pass their first final test without repair or retest. A pass rate that includes retested machines will overstate the usable throughput built here.

How should I set the target tested machines?

Take the shipping plan for the same period and add any buffer the sales plan carries. The variance then reads directly as machines the test station owes the plan.

Agricultural Equipment & Farm Machinery Manufacturing calculator

Final Test Throughput Calculator

Measure how many machines the final test station can pass in a period. Enter tested machines per cycle, available cycles, station uptime and first-pass yield, and compare the usable total with the shipment plan.

What this calculator does

Usable final test throughput after station uptime and test yield, against the shipment plan target.

Formula used

Gross throughput = machines tested per cycle × available test cycles
Lost to station downtime = gross × (1 − uptime ÷ 100)
Lost to test failures = gross × uptime ÷ 100 × (1 − yield ÷ 100)
Usable throughput = gross − lost to downtime − lost to failures
Variance versus target = usable throughput − target tested machines

Inputs explained

Machines Tested per Cycle: Machines the test stand runs per cycle, from the test schedule.
Available Test Cycles: Final test cycles available in the period, from the test plan.
Final Test Station Uptime: Share of scheduled test time available, from the uptime log.
First-Pass Final Test Yield: Share of machines passing first final test, from the test log.
Target Tested Machines: Tested machines the shipment plan needs, from the order book.

How to use the result

Best suited to sizing final test before a shipment push, deciding whether uptime or yield limits output.
Short test periods hide failures that appear only on machines with many hours. Rework and retest time is not modeled; a failed machine may consume a second cycle.

Current U.S. benchmarks

Industrial natural gas averages $4.58 per Mcf (EIA, Jul 2026), down 1.3% from a year earlier, with industrial electricity at 9.77 cents per kWh. Process heating and refrigeration budgets track both.
Steel mill PPI stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. New factory orders are up 8.5% year over year (Census).
The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

Why are the two losses derated in sequence, not added? Station downtime removes gross cycles, and test failures can only remove machines that actually reached the stand. Multiplying yield by the uptime share keeps the failure loss from double counting downtime.
What counts as a test cycle on this page? One complete pass through the stand for its full batch of machines. Partial cycles, retests and setup are excluded or counted separately before you enter the available cycles.
Is first-pass yield the same as the test log pass rate? Use the share of machines that pass their first final test without repair or retest. A pass rate that includes retested machines will overstate the usable throughput built here.
How should I set the target tested machines? Take the shipping plan for the same period and add any buffer the sales plan carries. The variance then reads directly as machines the test station owes the plan.

Last reviewed 2026-10-01.