Taken from (SMED) These are setup procedures that can only be effected when a machine is in a “Zero Mechanical State.”
Comments: The goal of SMED is to change dies or other components/processdef.htmes in under 10 minutes. “Internal” setup elements that require machines to be completely inoperable are one of the greatest sources of waste during a setup/changeover process. Therefore, much time and attention is dedicated to discovering how machines can continue running during most or all of the changeover process.
If a SMED Kaizen Team can make “Internal” setup procedures “External” they will generally reduce setup/changeover times by at least 50%.