In addition, the unloading of petroleum products is a complex and potentially dangerous operation since the unloading system contains complex interdependency components. The implementation of such tasks, also based on the methodology of optimal maintenance, requires appropriate knowledge about the course of operation of a given machine or its element in the past, currently and in a certain forecast of future use and its impact on potential failures and overall service life. Using these methods, the small failure data of any machine or system can be grouped and easily used for further reliability analysis. Production Systems Scheduling, Management and Maintenance Advancements in technology, such as information and communication technologies, have changed the traditional manufacturing systems practices.