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What is the primary purpose of a performance measure in agent design?

  • A.It records how quickly the agent executes each of its actions
  • B.It measures the computing resources the agent consumes in use
  • C.It compares the agent with a human performing the same task
  • D.It defines what counts as success and so what the agent optimises

Answer: D

Everything else follows from the performance measure, so stating it carefully, in terms of what is actually wanted rather than what is easy to measure, is the most consequential decision in designing an agent. A measure that rewards the wrong thing produces a system that pursues it faithfully. Speed, resource use and human comparison are secondary evaluations. Specification gaming is the direct consequence of getting this step wrong, which is why it heads the PEAS checklist.

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