Predictive maintenance is a very important concept especially for the industrial enterprises. Researchers have proposed various predictive maintenance proceedings and methods to implement predictive maintenance strategies. This thesis uses the literature review to examine the degree of integration of process knowledge for predictive maintenance. Based on this a business reference model for predictive maintenance was proposed. To verify and collect quantitative and qualitative statements on the need of maintenance, but also to validate the information regarding maintenance, a set of questions were recommended.