CHAPTER 3: QUESTIONS FOR REVIEW - CSUN



MSE614-SP08

Answers to HW Question for Review on Fundamentals of Expert Systems on handout given on Week 4 for Week 5

Even # questions need to be answered as HW (since the odd questions were answered in class by groups, and answers were given to them on a transparency in Week 4)

The Questions

Questions for Review

1. List three capabilities of ES.

2. Why did the General-purpose Problem Solver fail?

3. Explain this statement: "The power of an ES is derived from the specific knowledge it possesses, not from the particular formulas and inference schemes it employs."

4. Explain how ES can distribute (or redistribute) the available knowledge in an organization.

5. List the types of knowledge included in expertise.

6. THIS QUESTION WAS REMOVED !!!

7. List and describe the eight activities that human experts perform. Which activities are performed well by current expert systems?

8. Define the ES development environment and contrast it with the consultation environment.

9. List and define the major components of an ES.

10. What is the difference between knowledge acquisition and knowledge representation?

11. What is the role of a knowledge engineer?

12. A knowledge base includes facts and rules. Explain the difference between the two.

13. Which component of ES is mostly responsible for the reasoning capability?

14. List the major components of the inference engine.

15. What are the major activities performed in the ES blackboard (workplace)?

16. What is the function of the justifier?

17. List four types of potential users of ES.

18. List the ten generic categories of ES.

19. Describe some of the limitations of ES.

20. What is a ready-made ES? (Define and give an example.)

Answers to even # Questions (assigned as HW)

ANSWERS TO EVEN # QUESTIONS FOR REVIEW On

FUNDAMENTALS OF ES

1. In-Class in Week 4

2. Basically these procedures ignored the importance of the specific knowledge element of problem solving.

3. In-Class in Week 4

4. By transferring knowledge from the top experts and other sources into an ES we make this knowledge accessible to others, even in remote geographical locations.

5. In-Class in Week 4

6. About 60-65%

7. In-Class in Week 4

1. The development environment includes the activities and support which are necessary to acquire and represent the knowledge as well as to make inferences and provide explanations. The major players in this environment are the knowledge engineer and the domain expert who act as builders. Once the system is completed it is used for consultation by the non-expert user.

2. In-Class in Week 4

3. K owledge acquisition (KA) is the collection and extraction of knowledge from human experts (e.g. via interviews) and from other sources.

Knowledge representation (KR)is the organization of knowledge (once acquired) in the knowledge base. For example, t\in the form of rules.

4. In-class in Week 4

5. Facts are information which is fairly known and documented. For example, historical data, availability of resources and alternatives (choices). Rules represent the expert knowledge, for example "If the price of a share is larger than 20 times the per share annual earning, then do not buy it."

6. In-class in Week 4.

7. The interpreter, scheduler, and consistency enforcer.

8. In-class in Week 4.

9. The justifier, or the explanation facility provides answers to the users. Examples of questions are: "How was a certain conclusion reached?" and "Why is certain information needed by the computer?".

10. In-class in Week 4.

11.

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12. In-class in Week 4.

13. .Ready-made systems are systems that are sold in computer stores to users who want to buy general expertise in a certain area. For example, the systems WINE advises a user what wine is most appropriate for certain types of meals.

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