1. Failure diagnosis and prognosis based on physical models

Diagnosis involves investigating or analyzing the cause of a failure or degradation occurring in a piece of equipment, while prognosis concerns the calculation or prediction of its future behavior based on the relevant analyses and data available. The various definitions of the terms diagnosis and prognosis are proposed in numerous international standards for characterizing states of failure, degradation and prognosis, to which the reader may refer: NF EN 13306 , ISO 13372 : 2012