Technical systems are more complex every day as their electronics and mechanics. Technological advances tend to be autonomous in its performance and perform an auto-diagnosis that allows determining an abnormality existence in a component or subsystem and deciding if the system has to be stopped or not. The conventional maintenance does not allow an integrated diagnosis analysis of a system. Among the factors that generated condition can be found a lack of communication between units: bad information management, ignoring relevant information, a lack of a clear monitoring policy and variables tendency.