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. Content models, on the other hand, focus on static conditions and characteristics in the business that are considered to prevail over time. They grasp the content and structure of work rather than its processes. To exemplify the four different perspectives, a recurring example is used in the following. The planning work is described with the help of each model type.