Event management is a mechanism useful for the specification of the system behaviour when specified conditions occur. The ability to represent reality in manufacturing systems may be enhanced by the availability of a well structured and powerful event management facility. We compare concepts like process, event, object, used to manage events, in the CIMOSA and CCE frameworks, two manufacturing modelling environments. We identify the relationship between such concepts. The two event management models are analysed in detail, they are compared and their differences are identified.