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IT425-1403A-01 : Systems Analysis, Design and Integration - Assignment Example

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System Development Life Cycle (SDLC) is the development and implantation of an information system in a multi-step process involving phases from initiation through analysis, designing & implementation to maintenance and disposal phases. SDLC models constitute series of phases and…
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IT425-1403A-01 : Systems Analysis, Design and Integration
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Download file to see previous pages The very first phase in SDLC models is initiation. Initiation involves he expression of a need for the system and documentation of the specific purpose as well as high level specifications for the system. Development or acquisition is the next phase- it comprises designing, purchase, programming and development of the system. Sub-phases here include system development and acquisition cycles. Implementation or assessment is the 3rd phase involving installation and it follows initial tests of the systems performance. The fourth phase involves the system performing the intended purpose and thus is referred to as operations or maintenance. The sunset phase involves the disposal of the system on completion of its transition to a new computer system (Radack, 2009).
SDLC models are ultimately cost effective as it is possible to identify and mitigate security issues early. Risk management is applied in a timely fashion thus facilitating informed executive decisions. Crucial decisions concerning security of the system are made throughout development and are used to inform management’s considerations on security. Through SDLC models, improved integration and interoperability of the system is attained which would have been difficult if security was considered separately.
Rapid Application Development on the other hand is the process in which the entire cycle of developing a system is expedited. It therefore makes possible to fast develop quality system hence saves on resource use. RAD makes use of techniques and tools which are automated hence restructuring the entire process of constructing information systems. It effectively replaces coding and hand design which largely depend on skills by different persons with automated processes of design that are extremely stable. RAD is fast and less error prone, therefore more capable. As compared to traditional cycles ...Download file to see next pagesRead More
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