Lean Manufacturing & Operations worked example

SMED Time Savings with current changeover time of 15 min: a worked example

Suppose current changeover time falls to 15 min. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate time saved per shift from SMED improvements by comparing current and improved changeover times across total changeovers.

The inputs for this scenario

  • Current changeover time: 15 min (the input this scenario stresses; the baseline uses 30)
  • Improved changeover time: 10 min (held at the documented default)
  • Changeovers per shift: 4 count (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Time Saved = (Current Time - Improved Time) x Changeovers per Shift.
  • Time saved per shift (min) works out to 1 min / shift at these inputs, and this is the headline figure for the scenario.
  • Time reduction per changeover works out to 14 value at these inputs.
  • Current total changeover time works out to 15 value at these inputs.
  • Utilization works out to 6.67 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where current changeover time sits at 30 min and the headline result is 16 min / shift, this scenario comes in 93.75% below the baseline at 1 min / shift.
  • It multiplies the per-changeover time reduction by the number of changeovers per shift to give total minutes recovered each shift. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Time saved per shift (min): 1 min / shift (headline result)
  • Time reduction per changeover: 14 value
  • Current total changeover time: 15 value
  • Utilization: 6.67 %

Run it with your numbers

  • To rerun this with your own numbers, open the live SMED Time Savings calculator, set current changeover time to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.