An expert system is software that uses a knowledge base of human expertise to solve problems or clarify uncertainties in areas where human experts would normally need to be consulted. It captures knowledge from subject matter experts and represents it in a structured way so it can provide automated guidance or recommendations. Expert systems are used in many fields like medicine, engineering, science, and business to emulate the problem-solving abilities of human experts.

1. EXPERT SYSTEMS
Human intelligence in a
software

2. WHAT IS EXPERT
SYSTEM ?
• An expert system is software that uses a
knowledge base of human expertise for
problem solving, or to clarify uncertainties
where normally one or more human experts
would need to be consulted.

3. More on expert systems
• This type of system seeks to exploit
the specialised skills or information
held by of a group of people on
specific areas. It can be thought of
as a computerised consulting
service. It can also be called an
information guidance sytem. Such
systems are used for proposing
medical diagnosis or as educational
aids.

4. HOW DOES AN EXPERT
SYSTEM WORKS?
• A creation of a knowledge base which uses some knowledge
representation structure to capture the knowledge of the Subject
Matter Expert (SME).
• A process of gathering that knowledge from the SME and codifying it
according to the structure, which Is called knowledge engineering.
• Once the system is developed, it is placed in the same real world
problem solving situation as the human SME, typically as an aid to
human workers or as a supplement to some information system.

5. APPLICATION OF EXPERT
SYSTEM IN MEDICINE
 CaDet (for early Cancer detection)
 CaDet is a computer-based clinical decision support system for
Early Cancer Detection. Cancer risk evaluation and early
detection are subject to serious limitations mainly related to
human factors and to characteristics of the data involve.

6. Expert systems in
others fields
• Medical
• Engineering
• Artificial Intelligence
• Science
• Finance
• Mathematics
• Geology
• Computer science
• Business
• Law
• Defence and Education

7. A MEDICAL EXPERT SYSTEM
The knowledge omes
from a few highly skilled
advanced doctors -
leading experts in their
fields.
These doctors create
their rules and store
them in the system
knowledge base. After
that is done the system is
able to make automated
diagnoses suggestions
based on patients'
symptoms and research
data (analyses, etc.).