Graphical process diagrams ion—views and diagrams

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Abstract
Process design (and description) is largely an ad hoc discipline composed of several diagramming techniques with no clear definition of the process characteristics described by any one, usually with no definition of the relationship between the diagrams, and in most cases with no definition of the process design stages. This is in sharp contrast with product description and design, where the design stages and the various formats of the product definition information capture (diagrams and others) are well defined. In most cases today, when a process is designed, a process diagram is selected arbitrarily and is used to determine the process characteristics inherent in that diagram. Other characteristics not presented in that particular diagramming technique, are simply ignored, or in the best case, vaguely addressed. Whatever method or diagramming technique for process description is selected, it will not specify all the essential process characteristics needed for a full and complete specification of the process. This paper addresses the above problems. It discusses the need for process description and the process characteristics that need to be described. It presents a structure to categorize process diagrams and the concept of process views. In this context, the application of the IDEF0 method for modelling the functionality of systems/environments for process description is presented, and some modifications to this method are discussed.

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