A method for correlating business events in a complex business system. A flow diagram containing a collection of nodes (representing processes) and links (representing the transport connections) between these nodes is generated. An instance of an event stream from a node that is to be connected to an instance of an event stream from a neighboring node is identified when a node transports a transaction across a link. The metadata associated with the utilized link that was used to transport the transaction between the nodes is obtained. The instances of the event streams are then correlated using the obtained metadata. Further, each instance of the event streams is assigned an identification. In this manner, business events are correlated without the requirement of users providing a common key as well as without the requirement of monitoring each user of the system throughout the entire transaction.