kendall7e_im_ch10 - Chapter 10 1 Systems Analysis and...

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Systems Analysis and Design Instructor's Manual 10-1 1 Chapter 10 Preparing the Systems Proposal Key Points and Objectives 1. In order to prepare the systems proposal in an effective way, systems analysts must use a systematic approach to identify hardware and software needs—ascertaining hardware and software needs, identifying and forecasting costs and benefits, comparing costs and benefits, and choosing the most appropriate alternative. 2. In ascertaining hardware and software needs, systems analysts may take the following steps. First, inventory computer hardware already available in the organization. Second, estimate both current and projected workload for the system. Then, evaluate the performance of hardware and software using some predetermined criteria. Next, choose the vendor according to the evaluation. Finally, acquire the hardware and software from the selected vendor. 3. When inventorying computer hardware, systems analysts should check such items as type of equipment, repair status of equipment, estimated age of equipment, projected life of equipment, physical location of equipment, department or person responsible for equipment, and financial arrangement for equipment. 4. When evaluating hardware, the involved persons, including management, users, and systems analysts, should take the following criteria into consideration: time required for average transactions (including time for input and output), total volume capacity of the system, idle time of the central processing unit, and size of memory provided. 5. When evaluating hardware vendors, the selection committee needs to consider hardware support, software support, installation and training support, and maintenance support as well as the performance of the hardware. 6. When evaluating software packages, the selection committee needs to take the following factors into consideration as well as total dollar amount to purchase them. They are: performance effectiveness, performance efficiency, ease of use, flexibility, quality of documentation, and manufacturer support. 7. Analysts may need to weigh the options for building custom software, purchasing COTS (commercial off-the-shelf) software, or using an application service provider (ASP). 8. A decision support system should be able to support multiple-criteria decision making. Methods available for this support include a weighing method, sequential elimination by lexicography, sequential elimination by conjunctive constraints, goal programming, Analytic Hierarchy Processing (AHP), expert systems, neural nets, and recommendation systems. 9. Analytic Hierarchy Processing requires decision makers to judge the relative importance of each criteria and indicate their preference regarding the importance of each alternative criteria. 10.
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This note was uploaded on 11/13/2011 for the course MIS 4100 taught by Professor Maxnorth during the Spring '11 term at Birmingham-Southern College.

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kendall7e_im_ch10 - Chapter 10 1 Systems Analysis and...

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