The major difference between Decision Support Systems and Expert Systems is:

The major difference between Decision Support Systems and Expert Systems is:

• A. They are synonymous
• B. A DSS uses rules and ES uses queries
• C. That a DSS leaves the ultimate decision to the decision maker and the ES selects the best solution
• D. DSS is a step up or more complex than ES

Answer: (C)

The key idea is who makes the decision. A Decision Support System provides data, models, and analyses to help you compare options and understand likely outcomes, but the final choice rests with the decision maker. An Expert System, on the other hand, uses encoded knowledge and rules to reason toward a conclusion and often presents a recommended solution based on those rules. So, this difference—DSS supporting the decision and leaving it to the user, while ES tends to derive and suggest a best solution from its knowledge base—best captures how these two types of systems differ.

The key idea is who makes the decision. A Decision Support System provides data, models, and analyses to help you compare options and understand likely outcomes, but the final choice rests with the decision maker. An Expert System, on the other hand, uses encoded knowledge and rules to reason toward a conclusion and often presents a recommended solution based on those rules. So, this difference—DSS supporting the decision and leaving it to the user, while ES tends to derive and suggest a best solution from its knowledge base—best captures how these two types of systems differ.