Credentialing System Implementation at xxx Health Systems
The previous two parts of this three-part assignment, the systems analysis and application architecture and process design aspect of the credentialing software project at TPI Health Systems (TPI) was explored. This last paper will explore the implementation stage of the systems development life cycle (SDLC) as it related to the credentialing project at TPI. There are six major steps to the implementation phase of the SDLC: (1) coding, (2) testing, (3) installation, (4) documentation, (5) training and (6) support. The text actually details five steps and breaks-out the last step, support, into its own phase (Satzinger, Jackson, & Burd, 2004, p. 626). The first phase, coding, is done in any of three development styles: (1) input, process, output, (2) top-down, (3) bottom up. The input, process, output (IPO) method is defined by first doing the activities that require external input followed by elements that process the input and concluded by programs that produce output (Zachman, 1987, p. 279). The IPO is effective in developing user interface first and simplifies testing. It does have a disadvantage of late output modules (Satzinger et al., p. 629). The top-down and bottom up methods produce the needed top or bottom modules, respectively. Top-down coding has the advantage of having a working version of the program. Poor utilization of programming personnel in the beginning of the project is disadvantage of the top-down development method. The bottom-up method puts programming personnel to work immediate, utilizing resources effectively. Unfortunately, this method also requires additional programming to test the modules, as well as an overall delay of testing by waiting for the top modules to be developed. The credentialing project at TPI used a weak IPO method of coding. The major attention was placed on converting the data in the existing Visual Fox format to Microsoft SQL 2000 compatible data. The...
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