Chapter+6+-+2

Chapter+6+-+2 - Fact-Finding Techniques for Requirements...

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Fact-Finding Techniques for Requirements Discovery Chapter 6 (Continued)
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Observation Fact-finding technique where the Systems Analyst participates in or watches a person perform activities to learn about the system. Advantages? Disadvantages? Work Sampling - Fact-finding technique involving a large number of observations taken at random intervals.
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Observation Data gathered can be very reliable. Can see exactly what is being done in complex tasks. Relatively inexpensive compared with other techniques. Can do work measurements. People may perform differently when being observed. Work observed may not be representative of normal conditions. Timing can be inconvenient. Interruptions. Some tasks not always performed the same way. May observe wrong way of doing things. Advantages Disadvantages
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Observation Guidelines Determine the who, what, where, when, why, and how of the observation. Obtain permission from appropriate supervisors. Inform those who will be observed of the purpose of the observation. Keep a low profile. Take notes. Review observation notes with appropriate individuals. Don't interrupt the individuals at work. Don't focus heavily on trivial activities. Don't make assumptions.
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Questionnaires Special-purpose document that allows the analyst to collect information and opinions from respondents. Free-Format Questionnaire – Questionnaire designed to offer the respondent greater latitude in the answer. A question is asked, and the respondent records the answer in the space provided after the question. Open-Ended Questions. Fixed-Format Questionnaire – Questionnaire containing questions that require selecting an answer from predefined available responses.
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Questionnaires Often can be answered quickly. People can complete at their convenience. Relatively inexpensive way to gather data from a large number. Allows for anonymity. Responses can be tabulated quickly. Return rate is often low. No guarantee that an individual will answer all questions. No opportunity to reword or explain misunderstood questions or gather additional information. Cannot observe body language. Can be difficult to prepare. Advantages Disadvantages
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Types of Fixed-Format Questions Multiple-Choice Questions Rating Questions Ranking Questions Rank the following transactions according to the amount of time you spend processing them. ___ % new customer orders
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This note was uploaded on 04/17/2008 for the course M&IS 24060 taught by Professor G.dehondt during the Spring '08 term at Kent State.

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Chapter+6+-+2 - Fact-Finding Techniques for Requirements...

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