Structured Analysis Lec 1 - Structured Systems Analysis:...

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Unformatted text preview: Structured Systems Analysis: Structured Systems Analysis: ata Flow Diagrams ata Flow Diagrams Data Flow Diagrams Data Flow Diagrams EGA/ERLJ IE 154 Objectives for Today r Define Structured Systems Analysis(SSA) r Know the different techniques of SSA r Define Data Flow Diagrams (DFD) r Draw the components of DFDs r Know leveling concepts of DFDs r Know the strategies of constructing DFDs r Solve Examples Structured Systems Analysis r SSA is a systems approach to the analysis and design of information systems. r It was produced for a UK government office concerned with the use of technology in government from 1980 onwards. Objectives of SSA r Ensure that projects can successfully continue should a loss of staff occur without damaging effect on the project r Develop overall better quality information systems prove the way in which projects are controlled r Improve the way in which projects are controlled and managed r Allow more effective use of experience and inexperienced staff and their development r Make it possible for projects to be supported by computer based tools r Improve communication between participants in a project Characteristics of SSA r Bounding of Context: c Structured analysis establishes the scope of the effort and defines the area of concern r Limitation of Information: c The specifications are so organized so that details do not overwhelm the reader Characteristics of SSA r Top-Down Decomposition c The information is organized in a top down manner, beginning with an overview, going down to the different vels of detail. levels of detail. r Levels of Detail c Detail is introduced in a gradual manner. A top level representation of a subject must be coupled with a gradual introduction of more detailed information Objectives for Today r Define Structured Systems Analysis(SSA) r Know the different techniques of SSA r Define Data Flow Diagrams (DFD) r Draw the components of DFDs r Know leveling concepts of DFDs r Know the strategies of constructing DFDs r Solve Examples Techniques of SSA r Logical Data Modeling r Data Flow Modeling r Entity Behavior Modeling Techniques of SSA r Logical Data Modeling c This is the process of identifying, modeling and documenting the data requirements of the system being esigned. The data are separated into designed. The data are separated into entities (things about which a business needs to record information) and relationships (the associations between the entities). Logical Data Modeling Techniques of SSA r Data Flow Modeling c This is the process of identifying, modeling and documenting how data moves around an information system....
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This note was uploaded on 05/19/2011 for the course IE 2 taught by Professor A during the Spring '11 term at University of the Philippines Diliman.

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Structured Analysis Lec 1 - Structured Systems Analysis:...

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