Mattress, Bedding & Foam Product Assembly worked example

Spring Unit Output at 61% machine efficiency: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop machine efficiency to 61%, then walk the calculation through step by step. Calculate the effective hourly output of innerspring or pocketed coil assembly machines, adjusted for downtime, coil jams, and border wire setup.

The inputs for this scenario

  • Spring units assembled: 180 units (held at the documented default)
  • Elapsed production time: 8 hr (held at the documented default)
  • Machine efficiency: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw output rate = spring units assembled รท elapsed production time.
  • Effective throughput works out to 13.73 units / hr at these inputs, and this is the headline figure for the scenario.
  • Raw throughput works out to 22.5 units / hr at these inputs.
  • Efficiency works out to 61 % at these inputs.
  • Runtime works out to 8 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where machine efficiency sits at 85% and the headline result is 19.13 units / hr, this scenario comes in 28.24% below the baseline at 13.73 units / hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to machine efficiency, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. One efficiency figure cannot distinguish a wire-feed jam from a pocketing-fabric splice; it sizes the total loss but not its source.

Results at a glance

  • Effective throughput: 13.73 units / hr (headline result)
  • Raw throughput: 22.5 units / hr
  • Efficiency: 61 %
  • Runtime: 8 hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Spring Unit Output calculator, set machine efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.