Although the type or types of models being advocated varies between different approaches, the last years have showed a rising interest in models of processes. In order to avoid the risk of only identifying and addressing a limited set of issues, multiple perspectives of the business are required. Even in cases of BPR, there is a need to describe other things than processes. Other types of business models then become useful complements to the specific type of process models being used. One often-discussed difference has to do with available model types.
Today there is an abundance of different types of models to choose from.
As often as they are confused with each other, relationships between them are missed. Despite some differences being purely cosmetic, others deserve more close attention. Each of the four types represents a specific perspective on the business. Process models focus on dynamic courses of events in the business. Change and time-flow are important characteristics for a process model.