CODEWITHSUNDEEP
artificial-intelligenceagent
akash tripathi
akash tripathi

Reputation: 29

What is the difference between a performance measure and a utility function?

What is difference between performance measure and utility function described in book Artificial agent a practical approach

Upvotes: 1

Views: 12795

Answers (2)

Vivek Kumar
Vivek Kumar

Reputation: 31

Performance measure vs. utility function

  • A performance measure (typically imposed by the designer) is used to evaluate the behavior of the agent in environment. It tells does agent do what it’s supposed to do in the environment. A utility function is used by an agent itself to evaluate how desirable states are. Some paths to the goal are better (more efficient) than others – which path is the best. • Does agent do what it’s supposed to do vs. does agent do it in optimal way • The utility function may not be the same as the performance measure • An agent may have no explicit utility function at all, whereas there is always a performance measure

Upvotes: 3

Akshay
Akshay

Reputation: 783

So in general Performance measure is how we evaluate a agent/bot's behavior. So this generally maps to the expected behavior we have from the agent.

In contrast utility function is a function internally used by the agent to evaluate its performance.

They could be same in some cases but it's not necessarily true. Also a performance measure exists always but a utility function might not.

Upvotes: 4

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