翻訳と辞書 Words near each other ・ Optile ・ Optima ・ Optima (disambiguation) ・ Optima (grape) ・ Optima Bus Corporation ・ Optima Lake ・ Optima National Wildlife Refuge ・ Optima Telekom ・ Optima, Oklahoma ・ Optimal asymmetric encryption padding ・ Optimal binary search tree ・ Optimal capital income taxation ・ Optimal computing budget allocation ・ Optimal control ・ Optimal cutting temperature compound ・ Optimal decision ・ Optimal design ・ Optimal discriminant analysis ・ Optimal distinctiveness theory ・ Optimal Energy Joule ・ Optimal estimation ・ Optimal Flexible Architecture ・ Optimal foraging theory ・ Optimal maintenance ・ Optimal matching ・ Optimal mechanism ・ Optimal projection equations ・ Optimal rotation age ・ Optimal solutions for Rubik's Cube ・ Optimal stopping Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Optimal decision ： ウィキペディア英語版 Optimal decision An optimal decision is a decision such that no other available decision options will lead to a better outcome. It is an important concept in decision theory. In order to compare the different decision outcomes, one commonly assigns a relative utility to each of them. If there is uncertainty in what the outcome will be, the optimal decision maximizes the expected utility (utility averaged over all possible outcomes of a decision). Sometimes, the equivalent problem of minimizing loss is considered, particularly in financial situations, where the utility is defined as economic gain. "Utility" is only an arbitrary term for quantifying the desirability of a particular decision outcome and not necessarily related to "usefulness." For example, it may well be the optimal decision for someone to buy a sports car rather than a station wagon, if the outcome in terms of another criterion (e.g., effect on personal image) is more desirable, even given the higher cost and lack of versatility of the sports car. The problem of finding the optimal decision is a mathematical optimization problem. In practice, few people verify that their decisions are optimal, but instead use heuristics to make decisions that are "good enough"—that is, they engage in satisficing. A more formal approach may be used when the decision is important enough to motivate the time it takes to analyze it, or when it is too complex to solve with more simple intuitive approaches, such as with a large number of available decision options and a complex decision – outcome relationship. == Formal mathematical description == Each decision $d$ in a set $D$ of available decision options will lead to an outcome $o=f(d)$. All possible outcomes form the set $O$. Assigning a utility $U\_O(o)$ to every outcome, we can define the utility of a particular decision $d$ as :$U\_D(d)\; \backslash \; =\; \backslash \; U\_O(f(d))\; .\backslash ,$ We can then define an optimal decision $d\_\backslash mathrm$ as one that maximizes $U\_D(d)$ : :$d\_\backslash mathrm\; =\; \backslash arg\backslash max\; \backslash limits\_\; U\_D(d).\; \backslash ,$ Solving the problem can thus be divided into three steps: # predicting the outcome $o$ for every decision $d;$ # assigning a utility $U\_O(o)$ to every outcome $o;$ # finding the decision $d$ that maximizes $U\_D(d).$ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Optimal decision」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.