What does modeling mean and how does it help the development of ...

[wenmo]

What does modeling mean and how does it help the development of object-oriented information systems?
 
  What will be an ideal response?

Question 2

Which of the following is not a component of an expert system?
 
  A)
 
  a user interface
  B)
 
  an inference engine
  C)
 
  a simulation model
  D)
 
  a knowledge base

[hramirez205]

Answer to Question 1

Without modeling, system analysis and design is distorted into a multi-layered guessing game. A system analyst tries to understand what the client wants, interprets the requirements to the best of his abilities, and communicates his interpretations to the programmer. The programmer, in turn, uses his judgment to understand the analyst and build the actual system. The result is like the telephone game that children play: the first child starts by whispering a phrase or a sentence to the second child who, in turn, transmits the message to the third. By the time that the last child in line receives the sentence and utters it loudly, the message has been distorted beyond recognition.

Answer to Question 2

C