This paper presents an approach of data collection for equipment's health condition monitoring on its lifespan. A methodology is proposed for implementing and evaluating the data collection system. Then a credible approach and a data stream model are proposed for managing the equipment's lifecycle and health. The model serves also to evaluate the equipment's performances and remaining useful life. In addition, it helps keeping the quality of the data stream. Lastly, a methodology for robust evaluation of equipment's performances, in presence of rror propagation risks is proposed.