An expert system is a type of artificial intelligence system that uses knowledge and inference rules to solve complex problems in a specific domain, similar to a human expert. It consists of a knowledge base containing rules and expertise from multiple human experts, an inference engine that applies the rules to the problem, and a user interface for the user to input queries. Expert systems are useful because they can provide expert-level advice 24/7 without fatigue, are consistent, and contain knowledge from many experts. Common applications of expert systems include medical diagnosis, banking advice, and legal consultation. However, expert systems also have limitations like inability to learn from mistakes or use common sense.

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‫موجود‬ ‫حق‬
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2. Presenting Group:
AAKASH KUMAR
(15 IT 29)
SYED MUZAMIL SHAH
(15 IT 53)
KOUSAR RAHEEM
(15 IT 17)
KAINAT NOOR
(15 IT 41)
MARIAM SHAIKH
(15 IT 22)
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4. Our Goal:
 What is an Expert System?
 How does an Expert System work?
 Why we need Expert System?
 Applications
 Limitations
 Conclusion
 References
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5. What is an Expert System?
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≈
ExpertExpert System

6. What is an Expert System?
 Any software which behaves, advice or help you like
an expert is called an Expert System.1 .
 An Expert System is a computer system that emulates
the decision-making ability of a Human Expert.2
 Expert System consists of the rules and knowledge
from more than one Expert.3
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7. What is an Expert System? (cont.)
 An Expert System contains accumulated experience
and set of rules for applying the knowledge to each
particular situation that is given by user as a query or
requirements of a particular problem.4
 Typically, Expert Systems are designed to solve
complex problems by reasoning about knowledge,
represented mainly as if-then rules rather than
through procedural code.5 .
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8. How does an Expert System work? (cont.)
 User Interface:
 This is screen for user to receive the query or
requirements of problem. 6
 Inference (Rules) Engine:
 This is also known as brain of expert system which
contains the rules to solve a particular problem on the
behalf of knowledge from Knowledge Base.7
 Knowledge Base:
 Container of knowledge that is obtained from different
experts of a particular field while development.8
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9. How does an Expert System work?
EXPERT SYSTEM
Knowle
dge
Bas
e
UI
(User
Interfac
e)
Inference
(Rules)
Engine
Query
Advice
Non Expert
(User)
Human
Expert

10. Why we need Expert System?
 Experts System know more than one expert.9
 Uses knowledge based on Expert’s past experience.10
 Doesn’t forget or make mistakes.11
 Available 24/7. 12
 Never retires. 13
 Cost effective. 14
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11. Why we need Expert System? (Cont.)
11Worked 24 hours Worked 24 hours
55%
Accuracy
95%
Accuracy
Result ?

12. Applications of Expert System
Basic real time Expert Systems recently used:
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. . . .

13. Applications of Expert System
 Medical Diagnosis Expert System
 Bank Manager Expert System
 Chase Game Player Expert System
 School Teacher Expert System
 Lawyer Expert System
 And many more…
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14. Limitations
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≈
Human ExpertExpert System
! =
but

15. Limitations
 In Expert System there is no common sense used in
making decisions.15
 It requires cost to buy and set up the system. 16
 They have lack of creative responses that human experts
are capable of. 17
 They are not able to learn from the mistakes. 18
 Expert System will need continuous updating, which can
take it temporarily out of use. 19
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16. Conclusion
 Very interesting field of Artificial Intelligence.
 As an Expert has knowledge that help to advice,
same like that Expert Systems has knowledge base
that helps inference engine to advice.
 Expert System may result much better than an
human expert because it contains several expertise.
 When implemented correctly, expert systems may
remove human error.
 Expert system can be also used as a tool for
organizing researchers knowledge.
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17. References
1. Expert System, Channel Swapnil Patni, Youtube.
https://www.youtube.com/watch?v=ouKa6ZK9ZkM
2. Expert System, Wikipedia.
https://en.wikipedia.org/wiki/Expert_system
3. Expert System, Channel Swapnil Patni, Youtube.
https://www.youtube.com/watch?v=ouKa6ZK9ZkM
4. Expert System, Wikipedia.
https://en.wikipedia.org/wiki/Expert_system
5. Expert System, Channel Swapnil Patni, Youtube.
https://www.youtube.com/watch?v=ouKa6ZK9ZkM
6. 7. 8. Expert System, Maragret Rouse, TechTarget,
http://searchhealthit.techtarget.com/definition/expert-system
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18. References
9. 10. 11. 12. 13. 14.
Advantages of Expert System, Teach-ict,
http://searchhealthit.techtarget.com/definition/expert-system
15. 16. 17. 18. 19.
Disadvantages of Expert System, Teach-ict,
http://www.teachict.com/as_a2_ict_new/ocr/A2_G063/334_appl
ications_ict/expert_systems/miniweb/pg9.htm
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Thank You!
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Any Question?