2. Indicator features

2.1 Classification of maintenance indicators

To find one's way through the large number of commonly used indicators, and the more specific ones that each user can define according to his or her needs, it's useful to classify them according to their characteristics. Of course, there is no single way of doing this, and there are many classifications. To give just a few examples, the European standard EN 15341 distinguishes three categories of indicators: economic, technical and organizational; the American maintenance association SMRP ( http://www.smrp.org ) distinguishes the following categories: economic and management, production process reliability, equipment reliability, organization and training,...