System modeling is the process of developing abstract models of a system, with each model presenting a different view or perspective of that system. System modeling now usually means representing a system using some kind of graphical notation based on diagram types in the Unified Modeling Language (UML). However, it is also possible to develop formal (mathematical) models of a system, usually as a detailed system specification. I cover graphical modeling using the UML here, and formal modeling is briefly discussed in Chapter 10.
Models are used during the requirements engineering process to help derive the detailed requirements for a system, during the design process to describe the system to engineers implementing the system, and after implementation ...
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