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George Cree (102)
Chapter 14

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George Cree

Chapter 14Solving Problems 444Problem Solving The process to which you figure out how to reach your goalsGeneral ProblemSolving Methods ProblemSolving as SearchComparing problemsolving to a process of search like a maze some are direct and indirect pathsInitial state Knowledge and resources you have at outsetgoal stateProblem solver has set of operatorstools or actions that can change current statePath constraints Ruling out some option of some solutions might take form of resource limitation ie limited time or money or other limits ie ethical limitsAfter these there is limited number of intermediate states that one can reach to goal Problem spaceset of all states that can be reached in solving this problemHow to solve problem 1 Trace through entire problem spaceyou will fine the answer but very tedious 2 Maybe depends on what you are planning to do nextevaluate your possibilities ie Hobbits and Orcs Problem You should narrow your search and consider a subset of optionsproblemsolving heuristicGeneral ProblemSolving HeuristicsProblemsolving protocols Hels to identify some of problemsolving strategiesHillclimbing strategy Imagine you are hiking through the woods and trying to figure out which trail leads to mountaintop you need to climb upfill to reach the top so whenever you come to a fork in a trail you select the path that is going upfill You choose the option that moves in the direction of your goal Limited because you start by moving away form your goal only then from this new position can problem be solvedmove backward in order to go forward ie Hobbits and Orcs problem Tower of HanoiMeansend analysisCompare current state and goal state What means do I have available to get from here to there Show difference bw right now and where you want to be Breaking up problem into smaller subproblemyou address the larger problem eventuallyA way t solve a problem by using the goal as the starting point Working BackwardMental Models and Mental ImagesHelps to translate problem into concrete termsmental imagemodel ie bookworm problem people try an algebraic solution to this problem try to start by visualizing the arrangement
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