- Your machinery could actually be twice as large as you think. See, in addition to every machine there is often an identical 'hidden' machine. The trick is to reveal this hidden capacity and use it. 'The mistery of the hidden machine' offers you the key to unlocking this secret: Overall Equipment Effectiveness (OEE). This measuring instrument, which orginated in Japan, sheds light on production lossen and consequely enables them to be solved using improvement strategies such as TPM, Lean Manufacturing or Six Sigma. The book is suitable for both extensive study and a quick scan of the key points of OEE. In other words, it is the ideal guide for operators, mechanics and team leaders, as as management and human resources.