Question: Set up a meeting with a librarian During your meeting
Set up a meeting with a librarian. During your meeting, ask the librarian to describe the situations that come up in the library to which the book checkout system needs to respond. List these external events. Now ask about points in time, or deadlines, that require the system to produce a statement, notice, report, or other output. List these temporal events. Does it seem natural for the librarian to describe the system in this way? Similarly, ask the librarian to describe the things about which the system needs to store information. See whether you can get the librarian to list the important attributes and describe relationships among things. Does it seem natural for the librarian to describe these things? Create either an ERD or a class diagram based on what you learn.
Answer to relevant QuestionsVisit a restaurant or the college food service and talk to a server (or talk with a friend who is a food server). Ask about the external events, temporal events, and data entities or objects, as you did in exercise 1.What ...1. To what events must the ticket processing system respond? Create a complete event table listing the event, trigger, source, use case, response, and destination for each event.2. Draw an entity-relationship diagram to ...Describe how each column of an event table is represented on a DFD (that is, what symbols are used?).Assume that you are preparing a DFD to describe the process of creating, approving, and closing a mortgage loan by a mortgage broker. Should the broker be represented as an external agent or by one or more processes? Why? ...1. Develop DFD fragments for all of the events not documented in Figure.2. Develop a single DFD that shows processing for all events, using one process for each subsystem and showing all needed data stores. To simplify the ...
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