Nonwoven Materials & Technical Textiles worked example

Changeover Time at 12% setup, threading, and purge allowance: a worked example in nonwoven materials & technical textiles

This scenario runs the changeover time calculation on the strong side: 12% setup, threading, and purge allowance, with every other input held at its documented default. Use it when changeover time in nonwoven materials and technical textiles needs a defensible run time before a quote goes out.

The inputs for this scenario

  • Rolls or units to process in the changeover batch: 120 units (unchanged)
  • Line throughput rate during changeover run: 12 units / min (unchanged)
  • Setup, threading, and purge allowance: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base changeover time = changeover time workload รท changeover time completion rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for required changeover time, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base changeover time.
  • At this operating point the engine returns 12 % for changeover time allowance applied.
  • At this operating point the engine returns 12 pieces / min for changeover time completion rate.

How this compares with the baseline

  • Against the tool's baseline example, where setup, threading, and purge allowance sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
  • Use it when scheduling a grade change, quoting a job that needs a switchover, or setting a baseline before a SMED improvement effort. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Required changeover time: 11.2 hr (headline result)
  • Base changeover time: 10 hr
  • Changeover time allowance applied: 12 %
  • Changeover time completion rate: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live Changeover Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.