Lean & Planning

SMED Changeover ROI Calculator

Quantify the financial and capacity gains from reducing changeover time — compare current vs target setup, see the recovered production minutes per day, extra units, and annual revenue impact.

Formula
Time Saved = (Current − Target) × Changeovers/day

Enter your values

Average time the process is down for one changeover today Enter a valid current time (greater than 0).
Achievable changeover time after SMED improvement Target must be less than current time.
How many times the process changes over each working day Enter a valid frequency (greater than 0).
How many units the process produces per minute when running Enter a valid production rate (greater than 0).
Selling price minus variable cost per unit — used to estimate annual revenue gain Enter a valid margin per unit.
🔧

Ready to calculate

Enter your values on the left, then press Calculate.

Time recovered
minutes per day
Extra units per day
Annual revenue gain (£)
Changeover reduction
What this means

How it works

Understanding SMED Changeover ROI

1

SMED in one line

Single-Minute Exchange of Die (SMED) is a structured method to cut changeover time, ideally below 10 minutes. The technique separates internal steps (machine stopped) from external steps (machine running), then converts as many internal steps as possible to external.

2

Why changeovers matter

Long changeovers force big batches, which mean more inventory, longer lead times, and slower customer response. Cutting changeovers shrinks economic batch size — letting you run smaller, faster batches with the same machine and people.

3

The hidden gain

The headline gain is recovered minutes, but the bigger win is flexibility — being able to run any product on demand, with negligible setup cost. That collapses lead times, reduces forecast errors and frees up cash tied in finished-goods inventory.