SA/D Topic 4 -- Data Gathering


 

Data Gathering


Data Gathering Techniques


Sources for Data Gathering


Considerations Affecting Data Gathering
-- breadth vs. depth of collection

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-- open vs. closed questioning

-- direct vs. indirect questioning

-- structured vs. unstructured questioning

 


Problems of Data Gathering


Prerequisites to Data Gathering



Interviewing 

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Questionnaires -- used to ascertain attitudes, beliefs, behaviors, and characteristics of several key people in an organization who may be affected by the current and proposed systems.


Reasons to Use Questionnaires


Characteristics


Open-Ended Questions


Closed Questions

  Open-ended Closed
Speed of Completion Slow Fast
Exploratory Nature High Low
Breadth and Depth High Low
Ease of Preparation Easy Difficult
Ease of Analysis Difficult Easy

 


Guidelines for Choosing Language

Review topics on scales and questionnaire design (Ch. 6).



Observation -- witnessing firsthand the activities of users and decision makers.


Guidelines


Techniques

    Time Sampling   Event Sampling
Advantages
  • reduces bias when observations are randomized
  • allows a representative view of frequent activities
  • allows observation of actual behavior as it occurs
  • allows observation of important events

 

Disadvantages
  • data gathering is fragmented with no time for decision to unfold
  • misses infrequent but important decisions
  • requires a great deal of time
  • misses a representative sample of frequent decisions