Systems Analysis and Design: Chapter 5 - Information Gathering Unobtrusive Methods Objective's Recognize the value of unobtrusive methods for information gathering; Understand the concept of sampling for human information requirements analysis; Construct useful samples of people, documents, and events for determining human information requirements. | Information Gathering: Unobtrusive Methods Systems Analysis and Design, 7e Kendall & Kendall 5 © 2008 Pearson Prentice Hall Learning Objectives Recognize the value of unobtrusive methods for information gathering Understand the concept of sampling for human information requirements analysis Construct useful samples of people, documents, and events for determining human information requirements Create an analyst’s playscript to observe decision-maker activities Apply the STROBE technique to observe and interpret the decision-maker’s environment and their interaction with technologies 5- Kendall & Kendall Unobtrusive Methods Less disruptive Insufficient when used alone Multiple methods approach Used in conjunction with interactive methods 5- Kendall & Kendall Unobtrusive methods: sampling investigation observing Multiple methods approach – using unobtrusive methods in conjunction with interactive methods. Using both interactive and unobtrusive methods will result in a more . | Information Gathering: Unobtrusive Methods Systems Analysis and Design, 7e Kendall & Kendall 5 © 2008 Pearson Prentice Hall Learning Objectives Recognize the value of unobtrusive methods for information gathering Understand the concept of sampling for human information requirements analysis Construct useful samples of people, documents, and events for determining human information requirements Create an analyst’s playscript to observe decision-maker activities Apply the STROBE technique to observe and interpret the decision-maker’s environment and their interaction with technologies 5- Kendall & Kendall Unobtrusive Methods Less disruptive Insufficient when used alone Multiple methods approach Used in conjunction with interactive methods 5- Kendall & Kendall Unobtrusive methods: sampling investigation observing Multiple methods approach – using unobtrusive methods in conjunction with interactive methods. Using both interactive and unobtrusive methods will result in a more complete picture of human information requirements. Major Topics Sampling Quantitative document analysis Qualitative document analysis Observation STROBE Applying STROBE 5- Kendall & Kendall Sampling A process of systematically selecting representative elements of a population Involves two key decisions: What to examine Which people to consider 5- Kendall & Kendall By selecting a representative population the analyst can reveal useful information about the population as a whole. What to examine – there are many reports, forms, output documents, memos, and web sites that have been generated by people in the organization Which people to consider – which people should be selected to represent the population as a whole? Need for Sampling The reasons systems analysts do sampling are: Containing costs Speeding up the data gathering Improving effectiveness Reducing bias 5- Kendall & Kendall Containing costs: examining every document, talking to everyone, and reading every web page .
