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Computer-Aided Software Engineering (CASE) Tools Computer-aided systems engineering (CASE) tools are the software programs that help the development team do their jobs more efficiently and more effectively. These tools support the drawing and analysis of system models. Some CASE tools also provide prototyping and code generation capabilities. Some examples are: Oracle’s Designer 2000, Rational’s Rose, Platinum’s Erwin, Popkin’s System Architect 001, and Visible System’s Visible Analyst. At the center of any CASE tool’s architecture is a developer’s database called a CASE repository. CASE repository is a system developer’s database where developers can store system models, detailed description and specification, and other products of system development. It is also called dictionary or encyclopedia. Around the CASE repository is a collection of tools or facilities for creating system models and documentation. These facilities generally include: Diagramming tools –These tool

Different Approaches to Improving Information Systems Development Several different approaches have been developed in the continuous effort to improve the systems analysis and design process. The two important approaches are prototyping and joint application development (JAD). Prototyping Prototyping is a form of rapid application development (RAD). Prototyping is a rapid, iterative, and incremental process of systems development in which requirements are converted to a working system that is continually revised through close work between the development team and the users. We can build a prototype with any computer language or development tool, but special prototyping tools have been developed to simply the process. A prototype can be developed with some fourth-generation language (4GL), with the query and screen and report design tools of a database management system, and with tools called computer-aided software engineering (CASE) tools. Prototyping In prototyping

Developing Information Systems and System Development Life Cycle (SDLC) Most organizations use a standard set of steps, called a systems development methodology to develop and support their information systems. It is a standard process followed in an organization to conduct all the steps necessary to analyze, design, implement, and maintain information systems. And systems development life cycle (SDLC) is the traditional methodology used to develop, maintain, and replace information systems. It includes different phases as shown in the figure below. This representation of SDLC is sometimes referred to as the waterfall model or classic life cycle.   Fig: The systems development life cycle The first phase is called planning. In this phase, someone identifies the need for a new or enhanced system. These needs are then analyzed, prioritized, and arranged into a plan for the IS department. Here, a potential information systems project is explained and an argument for continui