L e a r n I n g o b j e c t I v e s
A data processing schedule
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| 4. A data processing schedule shows when each task should be performed. 5. System performance measurements are established to evaluate the system. Common measurements include throughput (output per unit of time, utilization (percentage of time the system is used, and response time (how long it takes for the system to respond). 6. A postimplementation review is performed after a development project is completed to determine whether the anticipated benefits were achieved. Some companies hire ab systems integrator to manage a systems development effort involving its own personnel, its client, and other vendors. These development projects are subject to the same cost overruns and missed deadlines as systems developed internally. For example, Westpac Banking began a five-year, $85 million systems development project to decentralize its systems, create new financial products, and downsize its systems department. Three years and $150 million later, no usable results had been attained, and it was clear the scheduled completion date would not be met. With a runaway on its hands, Westpac fired IBM, the primary software developer, and brought in Accenture to review the project and develop recommendations for salvaging it. Users - People who record transactions, authorize data processing, and use system output. systems analysts - People who help users determine their information needs and design systems to meet those needs. programmers - People who take the analysts design and develop, code, and test computer programs. computer operators - People who operate the company’s computers. information system library - A collection of corporate databases, files, and programs stored in a separate storage area and managed by the system librarian. data control group - People who ensure that source data is properly approved, monitor the flow of work reconcile input and output, handle input errors to ensure their correction and resubmission, and distribute systems output. steering committee - An executive-level committee to plan and oversee the information systems function. strategic master plan - A multiple- year plan that lays out the projects the company must complete to achieve its long-range goals and the resources needed to achieve the plan. project development plan - A document that shows how a project will be completed. project milestones - Points where progress is reviewed and actual and estimated completion times are compared. data processing schedule - A schedule that shows when each data processing task should be performed. system performance measurements - Ways to evaluate and assess a system. throughput - The amount of work performed by a system during a given period of time. utilization - The percentage of time a system is used. response time - How long it takes fora system to respond. PART II CONTROL AND AUDIT OF ACCOUNTING INFORMATION SYSTEMS Companies using systems integrators should use the same project management processes and controls as internal projects. In addition, they should Download 1.2 Mb. Share with your friends:
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