Single-Minute Exchange of Die
Single-Minute Exchange of Die, or SMED, is a structured method for reducing equipment setup and changeover time.
What this term means in maintenance
Single-Minute Exchange of Die, or SMED, is a structured method for reducing equipment setup and changeover time.
Core approach
SMED commonly involves:
- Observe the changeover
- Separate internal and external work
- Convert internal work to external where possible
- Simplify and standardize remaining steps
- Improve tools, fixtures, and adjustment
Internal and external activities
Internal activities require equipment to be stopped.
External activities can be completed while equipment is operating.
Practical example
Tools and materials are prepared before line stoppage, and fixed adjustment marks reduce trial runs.
Maintenance contribution
Maintenance can improve clamps, connectors, access, guides, tooling, and equipment condition.
Common mistake
Pressuring workers to move faster without redesigning the method creates safety and quality risk.
How this term differs
Single-Minute Exchange of Die is the improvement method used to reduce setup and changeover time. It is related to Changeover Time and Setup Time, but these terms describe different records, measures, roles, strategies, or decisions and should not be used interchangeably.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Changeover Time
Changeover time is the elapsed time required to switch equipment or a production process from one product, format, batch, or operating condition to another.
Setup Time
Setup time is the time required to prepare equipment, tools, materials, settings, and controls before production or maintenance activity begins.
Total Productive Maintenance
Total Productive Maintenance, or TPM, is a company-wide approach to improving equipment effectiveness through operator involvement, planned maintenance, quality control, training, and continuous improvement.
Glossary FAQs
- What does SMED stand for?
SMED stands for Single-Minute Exchange of Die.
- What is the main SMED principle?
Separate internal and external activities and convert internal work to external where possible.
- Does SMED mean every changeover takes under one minute?
No. The name refers to reducing changeovers toward single-digit minutes where practical.