Systems modelling theory Essay Example | Topics and Well Written Essays - 1000 words

Systems modelling theory - Essay Example In this scenario, a system can be used to denote different entities such as software system or its different parts, hardware system, or it can be a combination of both and the relationships between these parts. Hence, a system model can be recognized as a skeletal model of the system. In addition, system modelling provides an excellent support throughout the development and maintenance large and complex systems by paying a great deal of attention to the system development phase. In this scenario, the basic thought is to capture unstable or complex elements of a design within different parts through appropriately designed interfaces showing how each part communicates with its surroundings. Later on, these separated parts are combined in order to develop a complete system (Kresken, 1996; Pidd, 2004, p. 14). It is an admitted fact that systems modelling theory is capable of improving systems’ performance and reliability and minimizing systems development expenses as it makes the system development process very simple. For instance, it allows us to make use of previously developed components and routines to develop new systems. It also allows us to make changes to systems according to changing requirements for instance platform changes and functional enhancement, and to completely understand systems. Hence, we can say that systems modelling theory allows us to deal with a wide variety of requirements as it offers a set of tools like that consistency checkers, helps with documentation of the system and even we can also use it in the design stage of system development. To cut a long story short, system modelling technique is utilized to make sure that a developing component of software develops in a constant way and that it simplifies the process of combining different software parts (Kresken, 1996; Pidd, 2004, p. 14). In addition, in order to model a system there is need of a system modelling language (this language can be either textual and/or diagrammatic) and a theoretical structure. In fact, at the present there are many tools available that support system development through systems modeling theory. The majority of these tools use textual notations such as prose or tables, diagrammatic notations like graphs. Additionally, these diagrams use different symbols to symbolize the components of the system for instance objects, entities, and groups of objects, and a wide variety of other symbols representing the relationships between these components. In the past few years, four major theoretical structures have emerged: (Kresken, 1996; Pidd, 2004, p. 14) 1. Design Methods Design methods are based on a set of three components a concept, a language, and a design process. In this scenario, the concept outlines the modules of a program that are to be symbolized by the parts of the system model. On the other hand, the language defines the system model. Additionally, the system designer would have to follow a step-by-step procedure in order to compile design of the system in accordance with the software lifecycle. Moreover, there are many design methods which can be used for different purposes such as task design that is particularly developed for dealing with processes and their interactions, and synchronized systems design (Kresken, 1996; P