Author Question: The example of Purchase Groceries relates to an information system. Indicate whether the ... (Read 61 times)

james

  • Hero Member
  • *****
  • Posts: 573
The example of Purchase Groceries relates to an information system.
 
  Indicate whether the statement is true or false

Question 2

Describe generalizing actors.
 
  What will be an ideal response?



komodo7

  • Sr. Member
  • ****
  • Posts: 322
Answer to Question 1

FALSE

Answer to Question 2

An actor is an abstraction of real users. Customer generalizes selected attributes of real people who purchase goods and/or services from a business. But even these abstract entities may need to be generalized further if they share the same role with other actors in a use case: in conducting the affairs of an airplane, the captain and assistant pilot have distinct roles, but when one of them has the controls and actually flies the plane, it is one primary actor, Pilot, who follows the script of a Fly Boeing 747 use case.
Sometimes, however, we end up with generalized actors through a reverse process: specialization. Through expanding use cases and gathering requirements, we may find that an existing role is appropriate for certain use cases, but not others: during pre-flight check of the airplane, Pilot is not enough; Chief Pilot is needed to read off the checklist and Assistant Pilot is needed to check off the items.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

For a complete list of videos, visit our video library