Monday, May 12, 2003 11:06 PM
environmentSOL. Difference between A CASE REPORT and DFD.
Computer-aided software engineering (CASE) is the application of computers to assist in developing and maintaining software. CASE has been the one of the most common uses of engineering workstations in the past decade.
CASE represents a comprehensive philosophy for modeling business, their activities and information system development. CASE involves using the computer as a development tool to build models that descri and corporate planning, and to document computer system development from planning through implementation CASE presents that specifications for corporate plans, system design and system development become fully integrated. This occurs by sharing for the three functions of corporate planning system analysis and design and system development across CASE component.
Where as DFD( DATA FLOW DIAGRAM) is a tool used to model the data in processes that is specified in the analysis phase. DFD is a tool of Design Phase, which simply indicates or shows the data flow and function flow.
Analysis and design tools enable a software engineer to create models of the systems to be built. The models contain a representation of data, function and behaviors and characterization of data, architectural , component-level and interface design. By performing consistency and validity checking onto mo dels, analysis and design tools provided a software engineer with some degree of in sight into the analysis representation and help to eliminate errors before they propagate into design, or worse, into implementation itself.
The first exercise is to be undertaken is a requirement study. The techniques used for requirement study are varied, but process-modeling techniques like structured systems analysis and design and data modeling techniques like structured systems analysis and design and data modeling technique like E-R modeling are popular. CASE tools provide a means to document these techniques, facilitate checking completeness and correctness.