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What is the value of information in a planning context?

  • A.The number of states the observation would eliminate
  • B.The improvement in outcome that knowing a fact would bring
  • C.The cost of performing whichever sensing action reveals it
  • D.The probability that the fact will turn out to be true

Answer: B

Sensing is worth performing only if what is learned would change what the agent does, and the value is the resulting improvement in expected outcome. An observation that cannot change the decision is worthless however informative it seems. Cost, probability and state counts are inputs to the calculation rather than the value. Asking whether an answer would change the decision, before paying to obtain it, is a principle that applies well beyond planning.

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