utility based approaches decision making examine the situation in the game of the moment a decision is being the utility, priority, weight or score if each using function and then drive decision making using the value.
this can be contrated against purely decision making approaches the finite state machine (FSM) or behavior which evaluate a series of yes or no questions in order to select an option for excution.
the advantage of utility based on ai is that the better able to account5 the subtle situation whem making is decision, the situations where more than option is valid uility based ai will base its decision on an eveluation of the relative appropiateness and important pf each option insted of picking at random.
because the heuristic function are hand authored, the designers retain reasonably tight over control the behavuior of the ai is better ensure that the player's experience will fit with their design.
the calculating each option utility in game is not enough to fix the weights the options a priori, only by eveluting them based on the moment when the decision is being made can you achieve the responsive behavior that utility based ai promise.
