Changeover Time Calculator

Calculate total changeover time, SMED target, and number of production runs per shift.

Internal Time (min)

External Time (min)

Adjustment Time (min)

How to Use the Changeover Time Calculator

Enter internal setup time in minutes.
Enter external preparation time.
Enter adjustment/fine-tuning time and click Calculate.

使用场景

•SMED improvement projects.
•Production scheduling optimization.
•Calculating machine capacity and OEE.

公式

Formula: Total = Internal + External + Adjustment. SMED Target = Total × 0.5. Runs/Shift = 480 min / Total.

常见问题

What is SMED?

Single-Minute Exchange of Die (SMED) is a lean technique targeting changeovers under 10 minutes by converting internal to external setup activities.

What is the difference between internal and external time?

Internal time requires machine stoppage. External time can be done while the machine runs. SMED focuses on converting internal to external activities.

Why does changeover time matter?

Faster changeovers allow smaller batch sizes, reducing WIP inventory, increasing flexibility, and improving flow.