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database chap 10
Term | Definition |
---|---|
Main phases of database design | conceptual design, logical design, physical design |
Software Depression | Last few decades have seen increase of software applications, many requiring constant maintenance; correcting faults, implementing user requirements, modifying software to run on new or upgraded platforms. Effort spent on maintenance absorbed resources a |
Result of the Software Depression included projects that were | Late, over budget, unreliable, difficult to maintain, and performed poorly |
Software Crisis Led to... | The Software Depression (late 60's) |
Major reasons for failure of software projects includes | lack of a complete requirements specification, lack of appropriate development methodology, poor decomposition of design into manageable components |
Structured approach to development was proposed, called | Information Systems Lifecycle (ISLC) |
Database System Development Lifecycle Stages | Database planning, System Definition, Requirements collection and analysis, Database Design, DBMS selection (optional), Application design, Prototyping (optional), Implementation, Data conversion and loading, testing, & operational maintenance |
Information System | Resources that enable collection, management, control, and dissemination of information throughout an organization. Database is fundamental component and its development/usage should be viewed from perspective of the wider requirements of the organization |