INFS1603 Lecture Notes - Lecture 9: Database Administrator, System Analysis, Database Design

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Information systems (is) are systems that use it to capture, transmit, store, retrieve or display information used in one or more business processes. Important issues when building is: the system must solve the right problem, the system must be built in the most effective way, the system must fit into the existing environment, the system must be easy to use. Planning: general overview of the company and objectives, feasibility of a new system. Analysis: user requirements, existing system evaluation (how do these requirements fit into overall system?, logical system design. Detailed systems design: completion of design which includes screens, menus, reports etc. Implementation: cycle of coding, testing & debugging. Maintenance: evaluation, maintenance, enhancement (full redevelopment = start agai, word 07 word 11) 9. 3 database development lifecycle: also called database life cycle, part of the sdlc, six phases. Database initial study: analysing the organisation, objectives, operations, structures, defining problems and constraints, function of existing systems.

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