1. One of the potential problems mentioned in this chapter with gathering information requirements by observing potential system users is that people may change their behavior when observed. What could you do to overcome this potentially confounding factor in accurately determining information requirements?
A great way to overcome this problem is to get an anonymous person to conduct the observation. Without the people having this knowledge, this will allow the system users to act normal. This would allow for accurate gathering of information. 2. Suppose you were asked to lead a JAD session. List ten guidelines you would follow in playing the proper role of a JAD session leader.
I would make sure all the proper personal are going to be present. These being the users, managers, sponsor, system analyst, scribe and IS staff. By doing this I have to make sure I have the expenses organized, from flying people in to the meeting room. Time management is very important to this because the longer it takes the more expensive it will be. In order for the meetings to proceed smoothly, the proper tools have to be present. These tools are flip-chart paper, whiteboards, and audiovisuals. Communication is going to be very important in these meetings since everyone will have something to say about the systems, this being good or bad. I have to make sure everything stays on track and at the end of these meetings a solution is found for the problem. 3. What unique rules apply to drawing context diagrams?
When drawing context diagrams you have to keep in mind that no data stores are shown, but there is only one process symbol. Context diagram is an overview of an organizational system that shows the system boundaries, external entities and the major flow of information between the entities and the system. 4. Explain what the term DFD consistency means and provide an example.
DFD consistency is the extent to which information contained on one level of a set of nested data-flow diagrams is also included on other levels. A great example to this is if you have a data flow named customers, which serves as input to process 1 on a level-0 DFD, it also appears as input to process 2.1 on level-0 diagram process 2.