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kendall7e_im_ch05 - Chapter 5 Systems Analysis and Design...

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Chapter 5 Systems Analysis and Design Instructor's Manual 5-1 Chapter 5 Information Gathering: Unobtrusive Methods Key Points and Objectives 1. Sampling is a process of systematically selecting representative elements of a population. 2. For effective systems analysis, systems analysts should decide target documents and target interviewees. 3. The reasons systems analysts do sampling are reduction of costs, speeding up the data gathering process, improving effectiveness, and reduction of data-gathering bias. 4. To design a good sample, a systems analyst needs to follow four steps: A A. Determining the data to be collected or described. B B. Determining the population to be sampled. C. Choosing the type of sample. D. Deciding on the sample size. 5. The sample size decision should be made according to the specific conditions under which a systems analysts works with, such as sampling data on attributes, sampling data on variables, or sampling qualitative data (refer to the discussion in the text for detailed steps to determine sample size under each condition). 6. In addition to sampling, investigation of hard data is another effective method for systems analysts to gather information. 7. Hard data can be obtained by: A. Analyzing quantitative documents such as records used for decision making B. Performance reports C. Records D. Data capture forms E. Ecommerce and other transactions 8. Records may be inspected by the following, which may indicate their usability: A. Checking for errors in amounts and totals B. Looking for opportunities for improving the recording form design C. Observing the number and type of transactions D. Watching for instances in which the computer can simplify the work
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Chapter 5 Information Gathering: Unobtrusive Methods 5-2 9. Questions to ask when analyzing forms, including aspects of the human-computer interaction relating to usability, aesthetics, and usefulness: A. Is the form filled out in its entirety? B. Are there forms that are never used? C. Are all copies of forms circulated to the proper people or filed appropriately? D. Compare completion rates for forms that are both paper-based and on the Web E. Are unofficial forms being used on a regular basis? 10. Examine qualitative documents for the following:
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