Author Question: The example of Purchase Groceries relates to an information system. Indicate whether the ... (Read 62 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?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

For a complete list of videos, visit our video library