ENGRI 172 Notes

ENGRI 172 Notes - I Definition problem-space specification...

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I. Definition: problem-space specification To specify a problem space is to define for it, in order, the following four components: A. The set of states (also known as the state set ). The state set must contain at least one state. (The intent is that the states in the set represent all the distinct situations one is willing to have taken under consideration, and that each state sums up all of the relevant information about its associated situation.) B. The initial state , which must be one of the states in the state set. (The intent is that the initial state correspond to the beginning situation.) C. The set of goal states . The goal states must be selected from among the states in the state set, but there can be zero, one, or many of them. (The goal states are intended to correspond to the desired or acceptable outcome(s).) D. The set of operators . There must be at least one operator in the set, and, for each operator, one must indicate (perhaps implicitly) which states it is applicable to and which single state is reached (transitioned to) when it is applied to each such state. (The intent is that the operator set represent all
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ENGRI 172 Notes - I Definition problem-space specification...

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