Why is the allowance a percent, not fixed hours?

Setup and staging scale with the number of pumps in the run. A share of base assembly time keeps a short run from carrying a full shift of delay. Enter the share your build records support.

What does a negative window margin mean?

The run needs more hours than the bay is held. Stage kits earlier, add a shift or raise the line rate so the required hours fall under the window.

How do I set the line rate confidently?

Time a few complete pumps at the steady pace between breaks, then divide pumps by hours. Use the same crew and station setup the run will use.

Does the allowance cover rework?

Only if your build records put rework inside this line's pace. A separate rework loop belongs in the rate or in a second calculation, not in an allowance.

Water, Wastewater & Pump Systems Manufacturing calculator

Pump Assembly Cycle Time Calculator

Work out how long a pump assembly run takes when the line rate and a setup, staging and delay allowance both apply. The margin shows whether the run fits the assembly bay window.

What this calculator does

Assembly hours for a pump run at a line rate with a setup allowance, checked against the bay window.

Formula used

Base assembly time = pumps to assemble ÷ assembly line throughput rate
Required assembly time = base assembly time × (1 + allowance ÷ 100)
Allowance hours = required assembly time − base assembly time
Window margin = assembly bay window − required assembly time

Inputs explained

Pumps to Assemble This Run: Pumps scheduled for this assembly run, from the build order.
Assembly Line Throughput Rate: Completed pumps per hour at the line's steady pace.
Setup, Staging, and Delay Allowance: Extra time for setup, staging and delay, as a share of base.
Assembly Bay Window: Hours the assembly bay is held for this run.

How to use the result

Best suited to scheduling a pump build on one line, checking a bay booking against a run.
A rate drop at changeover or a rework loop can push the run past the window. The model does not include test or paint time after assembly.

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

Why is the allowance a percent, not fixed hours? Setup and staging scale with the number of pumps in the run. A share of base assembly time keeps a short run from carrying a full shift of delay. Enter the share your build records support.
What does a negative window margin mean? The run needs more hours than the bay is held. Stage kits earlier, add a shift or raise the line rate so the required hours fall under the window.
How do I set the line rate confidently? Time a few complete pumps at the steady pace between breaks, then divide pumps by hours. Use the same crew and station setup the run will use.
Does the allowance cover rework? Only if your build records put rework inside this line's pace. A separate rework loop belongs in the rate or in a second calculation, not in an allowance.

Last reviewed 2026-10-01.