


Gantt and PERT charts are based on concepts of activities and their temporal sequencing including parallel branching, but they do not support events and conditional branching. A high number of different types of flowcharts has been proposed in the sequel, also for the purpose of describing algorithms in Computer Science, leading to an ANSI/ISO definition in the 1960’s/1970’s. Historically, the first examples of discrete process modeling languages are Gantt charts, Process Charts and PERT/ GERT charts, which have been developed in the 1910’s, 1920’s and 1950’s/1960’s, respectively, in the fields of Industrial Engineering and Operations Research. The Evolution of Discrete Process Modeling Languages While there are many discrete processes that do not have an organizational context (like, for instance, the operation of an elevator, message exchange processes in digital communication networks or private conversations among people), a BP always happens in the context of an organization.

We can therefore describe a business process (BP) as a discrete process that involves business activities performed by organizational agents qua one of their organizational roles defined by their organizational position. discrete manufacturing (e.g., of cars or phones) with discrete processes modeled with the help of a discrete process modeling language.process manufacturing (e.g., of sugar or chemical liquids) with continuous processes modeled by differential equations, which can be described by stock-and-flow diagrams, and.For instance, in production management, they distinguish between Processes are characterized through the state changes they bring about, and since state changes are either continuous or discrete, we have to distinguish between two fundamental types of processes: continuous processes and discrete processes. But, ontologically, there are different types of processes, and business processes are only one special type of process. For many in the Business Process Modeling/Management (BPM) community, the term “process” is synonymous with “business process”.
