DSS Vs Expert System

By Anita JohriINFS 401

Spring 2012

Anita Johri - INFS 401 2

What is DSS?• Helps in decision making when trying to figure out solution for a non structured

decision. Focuses on problems that are unique, non routine & rapidly changing.

Spring 2012

Anita Johri - INFS 401 3

3 Components of DSS:

• Model Management• Data Management• User Interface Management

Spring 2012

Anita Johri - INFS 401 4

Examples…of DSS:

Spring 2012

Anita Johri - INFS 401 5

What is Expert System?

• Major roles of individuals who interact with the system– Domain expert – Knowledge engineer – User

• The major components are:• Knowledge base • Working storage • Inference engine • User interface

Spring 2012

Anita Johri - INFS 401 6

Problems in developing an ES:

Spring 2012

1. The expert is unable to communicate his/her ideas2. The expert is unwilling to communicate his/her ideas3. The expert is not available4. Can all the testing be accomplished?5. User acceptance

Disadvantages of Rule-Based Expert Systems

1. Common sense2. Creativity 3. Learning 4. Sensory Experience 5. Degradation

Anita Johri - INFS 401 7

Advantages of ES

• Availability• Cheaper• Reduced danger• Permanence• Multiple expertise• Explanation• Fast response• Unemotional and response at

all times

Spring 2012

Anita Johri - INFS 401 8Spring 2012

Ethical implications:

Do you want to put a decision about your life in the hands of a computer?

When do you think you’d trust a computer’s judgment over a doctors?

Does anyone know any examples of expert systems used in everyday life?

Anita Johri - INFS 401 9

Where are Expert System used?• Aircraft accident investigations- GP1020 Computer Tool• Robotic surgeries. more than 300 surgeries done.• Scientist use Robots in space research/ or radioactive places where its not safe for

humans to go.• Interactive games : Chess, Wii• Saya : Taking tech classes.(surprise, fear, disgust, anger, happiness and sadness)• Triage – Medical Diagnosis (Medical Expert System)• Patriot Missile Guidance System

– Radar identifies Scud missile– System steers Patriot missile to intercepts Scud missile– Laws of physics, expert knowledge about missile trajectory is captured in the

system

Spring 2012

Anita Johri - INFS 401 10

DSS

• Facilitates decision making

• Unstructured environment

• Alternatives may not be fully realized yet

• Extract or gain knowledge from a computer system

• Use goals and the system data to establish alternatives and outcomes, so a good decision can be made

Expert Systems

• Automate decision making.

• The decision environments have structure

• The alternatives and goals are often established in advance.

• Inject expert knowledge in to a computer system.

• The expert system can eventually replace the human decision maker.

Spring 2012

Anita Johri - INFS 401 11

References:

Spring 2012

http://worldacademyonline.com/article/25/367/dss_applications.html

http://www.tech-faq.com/decision-support-system.html

http://wiki.answers.com/Q/Different_between_expert_system_and_decision_support_system

http://en.wikipedia.org/wiki/Decision_support_system

www.google.com