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OEE is Not TPM

lean development and process automation how oee can help your manufacturing processes

OEE is Not TPM (and Other Misunderstandings) Overall Equipment Effectiveness (OEE) is the measure most closely associated with TPM, but OEE is not equivalent to TPM. At its heart, TPM is not about complex metrics; it’s about developing the capabilities of people. Everyone is involved in pursuing the dual goals of zero breakdowns and zero defects. Production, maintenance, and engineering form an efficient partnership, and operators share “ownership” in equipment. The new attitudes and behaviours result in a cultural shift that improves morale, drives continuous improvement, targets total asset reliability, and supports lean initiatives. TPM is fundamental to achieving lean flow, because flow can’t happen without reliable equipment and processes. In turn, a good understanding of OEE fosters an effective TPM effort.

Because OEE packs a lot of information into one number, it’s powerful. But that can also make it difficult to calculate and confusing to interpret. People commonly get into trouble when they try to:

  • Use OEE primarily as a high-level KPI (key performance indicator)
  • View OEE as an external measure that has meaning to customers
  • Multiply OEE across several machines in a department or plant
  • Calculate OEE on every piece of equipment
  • Gauge themselves against a “world-class” OEE measure
  • Focus on the number for its own sake instead of the improvement context
  • Use OEE as a club rather than a yardstick
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