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System Building

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System Building
April Willochell
Digital Firm

There are a number of alternative methods for building information systems, each suited to different types of problems. The oldest method for building systems is the systems life cycle, which requires that information systems be developed in formal stages. The stages must proceed sequentially and have defined outputs; each requires formal approval before the next stage can commence.” The system life cycle is useful for large projects that need formal specifications and tight management control over each stage of systems building.” ( Building Systems History, 2012) However, this approach is very rigid and costly and is not well suited for unstructured, decision-oriented applications for which requirements cannot be immediately visualized.

Prototyping consists of building an experimental system rapidly and inexpensively for end users to interact with and evaluate. The prototype is refined and enhanced until users are satisfied that it includes all of their requirements and can be used as a template to create the final system. Prototyping encourages end-user involvement in systems development and iteration of design until specifications are captured accurately. The rapid creation of prototypes can result in systems that have not been completely tested or documented or that are technically inadequate for a production environment.

Developing an information system using an application software package eliminates the need for writing software programs when developing an information system. Using a software package reduces the amount of design, testing, installation, and maintenance work required to build a system. “Application software packages are helpful if a firm does not have the internal information systems staff or financial resources to custom develop a system. To meet an organization’s unique requirements,

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