SMED – What is it & what is it good for

4 04 2010

SMED is the shortcut for Single Minute Exchange of Die and it’s a method for reducing waste along the value chain (lean production). It provides a fast and efficient way of converting a a manufacturing process from runnig the current product to running the following product.

The setting up process can be divided into internal and external setting up:

Internal setting up: has to took place directly at the machine -> downtime -> loss of capacitiy (which means also a waste of money)

External setting up: hasn’t to took place directly at the machine -> no downtime -> no loss of capacity

So you see: the main aspect of SMED is to set up preliminarily tools where ever it is possible or in other words try to convert as much internal setting up time as possible into external setting up time (caused due the fact that there is no downtime at external setting up).

Approach at SMED:

  1. Observation and measurement
  2. Seperate internal and external setting up
  3. Convert external -> internal setting up
  4. Rationalize the internal parts
  5. Alignment of a new standard

Requirements for SMED:

  • employees with an adequate qualification
  • time (training of the employees, accomplish the 5 steps mentioned above)
  • capital

Results of SMED:

  • enhancement of the machinecapacity through minimizing setup time
  • customer orientated prodcution ( fast reaction to volatile demands, short throughput times)
  • cost reduction

Similiar methods:

  • Zero-Changeover (setting up within 3 minutes)
  • OTED (=One Touch Exchange of Die)

Umrüsten innerhalb von drei Minuten

nOTED (=One Touch Exchange of Die)

Umrüsten durch eine Armbewegung