Why do you need it?

  • Equipment PM (Preventive Maintenace) takes a few hours and has a large impact on the operation of the production equipment before and after it.
  • The buffer between equipments is normally small when factory operation is optimized by TPS and JIT. In this case, production volume is largely affected before and after PM.
  • There are too many factors affecting PM.

PM Strategy

Forward PMBackward PMSynchronous PM
Required buffers smalllarge
PM manpowersmallsmalllarge
  • Forward PM: Start of the second facility PM after completion of the first facility PM
  • Backward PM: Start of previous facility PM after completion of last facility PM
  • Synchronous PM: Start all equipments in line simultaneously PM

Operation process