Live Tool
Changeover setup
Stage 1: Separate · Stage 2: Convert · Stage 3: Streamline
Calculator Library / Lean Setup Reduction
SMED Changeover Time Reducer
List your changeover steps, classify each as internal or external, and see the projected downtime after each of Shingo's three SMED stages — separate, convert, streamline.
Editable Steps
Changeover steps
| Step | Current Min. | Classification | Convert to External? | Streamlined Min. |
|---|
Results
Projected Changeover Time
| Stage | Changeover Time | Time per Shift |
|---|
How to Use This Calculator
List every step in a real, timed changeover. Classify each as Internal (requires the machine stopped) or External (could be done before or after the stop). Check "Convert to External" on any internal step you plan to move off the machine entirely — pre-staging, pre-heating, or pre-assembling on a jig. For remaining internal steps, enter a streamlined time reflecting functional clamps, positioning stops, or parallel operations.
Reading the Results
| Stage | What It Represents |
|---|---|
| Baseline | Total time of every listed step, as if none had been separated yet. |
| After Separation | Total time of only the steps classified Internal — external steps are moved off the downtime clock. |
| After Conversion | After removing any internal steps checked "Convert to External." |
| After Streamlining | Using each remaining internal step's streamlined time estimate. |
FAQ
How does this SMED calculator estimate time savings?
It totals baseline downtime from your listed steps, then shows reduced downtime after separating external steps out, converting selected internal steps to external, and streamlining whatever remains.
What should I enter as the streamlined time for a step?
Your best estimate of the step's time after Stage 3 techniques like functional clamps or positioning stops. Leave it equal to the current time if no specific improvement is planned yet.