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Paper - Concepts for Modeling Large Real Time Systems

An Academic Dissertation on - Concepts for Modeling Large Real Time Systems by Ivar Jacobson - 1985

The development and maintenance of large real time systems relies on a methodology for specification, design (including programming) and implementation. The resulting systems reflect the modeling concepts underlying that methodology, and how those concepts have been concretized in the form of languages, tools and implementation.

This thesis consists of two main parts, one oriented towards software engineering and the other oriented towards computer science:

1)  A set of system modeling concepts is outlined informally. The concepts are motivated by the different processes carried out on the system during its entire lifetime. These processes include specification, design, implementation, production, installation, operation, etc., concurrent activities on different parts of the system. The concepts are 'real-world oriented' in that they correspond to entities of the world, and the concepts are 'change oriented' in that they support not only the first development stage of a system but also its continuous change and evolution.

Furthermore, a specification and design method based on the given modeling concepts is outlined informally.

2)  A language supporting this method is formally defined.