Functional and Structural Modeling Coursework Example | Topics and Well Written Essays - 750 words

working(a) and Structural Modeling - Coursework ExampleIntroduction Functional manikin generally deals with the activity of developing models of devices, objects and processes of a system based on their functionalities. It is basically bear on with representing knowledge about functions which forms a basis for solving problems related to system representation. It shows how general system goals atomic number 18 achieved through the realization of the sub goals via the system sub functions. According to Tauber, functional model represents a bump of the designers intention, the design rationale. (pg 12). Structural modeling on the other hand entails data structure description, that is, it defines the structure of data that is supports the business processes of an organization. There are different ways of representing the structure of data utilise in a system including class diagrams, object diagrams and CRD cards. Structural modeling Structural modeling in system analysis and de sign is useful in various ways but the main take aim of geomorphological models is to represent ideas, things and important concepts in the application domain. In addition, structural models are used to fashion a vocabulary for analysts and users. According to Wixom, It is also used in order to reduce the schematic bedcover between the real world and the software world ( chpt 7 pg 6) Classes, attributes, relationships and operations constitutes the four major components of structural modeling. Classes are templates for creating objects or instances and cornerstone either be concrete or abstract. Classes example may take on user interface data structure and application domain. Class diagrams are used in structural modeling to represent classes, show their attributes, operations and their relationships. Attributes on the other hand are used to describe classes and only important and relevant attributes to the task are included in the structural modeling. An attribute stinker be public, private or protected depending on its visibility type. Objects or instances can take actions cognize as operations while relationships show how classes are associated. Operations can be broadly class into update (changes value of attributes), query (makes information about state available) and constructor which create an object. Functional modeling Functional modeling include various design element much(prenominal) mental facultys, processes inputs and outputs, interfaces and design of databases and files. A to the full functional system is made up of a collection of small independent subsystems called modules. The modules are coded and knowing separately after which they are brought together to form a complete and fully functional system. share use and size are some of the factors to be considered while coding a designing a module. Limiting the number of instructions in a module ensures a small size module which recommended compared to a large module. Duplication of functions in modules should be avoided by creating a single module which can be called by other modules in case of need. System functions consist of processes which are specific acts with definable beginning and ending points beside inputs and outputs. Processes may be distinct but share certain common properties such as processes identify what is done and not how, they posses definable starting and ending points, processes are carried out regardless of organizational structure. Interface is an important part of any computerized system since it provides the platform for the user to interact