Week 7

Name one way that the traditional and object-oriented approaches to information systems development are similar. Explain how they are similar.

 Traditional and object-oriented approaches are  similar in the systems implementation phase when the new system is constructed.  Whether the developers used structured analysis or object-oriented methods, the procedure is the same-programs are written, tested and documented and then the  system is installed. If the system was purchased as a package , system analysts configure the software and perform any necessary modifications. The objective of the system implementation phase is to deliver a completely functioning and documented information system.

At the conclusion of this phase, the system will be ready for use. Final preparations include converting data to the new system’s files, training users, and performing the actual transition to the new system. The systems implementation phase also includes an assessment, called a systems evaluation, to determine whether the system operates properly and if costs and benefits are within expectations.

Name one way that the traditional and object-oriented approaches to information systems development are different. Explain how they are different.

When implementing a structured design, a structure chart is used to describe the interaction between program modules, however when implementing an object-oriented design, relationships between objects already exist. Because object interaction is defined during the object-oriented analysis process , the application’s structure is represented by the object model itself. Because objects contain both data and program logic, called methods. Individual object instances belong to classes of objects with similar characteristics. The relationship and interaction among classes are described using a class diagram. A class diagram includes the class attributes, which describes the characteristics of objects in the class, and methods , which represent program logic.

When a programmer translates an object-oriented design into an application , he analyzes the classes, attributes, methods, and messages that are documented in the object model. During this process, the programmer makes necessary revision and updates to class diagrams, sequence diagrams, state transition diagrams and activity diagrams.