Overall equipment efficiency or effectiveness (OEE) is a hierarchy of metrics proposed by Seiichi Nakajima1 to measure the performance of the equipment in a factory. OEE is a really powerful tool that can be used also to perform diagnostics as well as to compare production units in differing industries. The OEE has born as the backbone of Total Productive Maintenance (TPM) and then of other techniques employed in asset management programs, Lean manufacturing2, Six Sigma3, World Class Manufacturing4.
By the end of the 1980’s, the concept of Total Production Maintenance became more widely known in the Western world5 and along with it OEE implementation too. From then on an extensive literature6-7 made OEE accessible and feasible for many Western companies.
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