similar to decision theory, game theory studies decisions that are made in an environment where various players interact. In other words, game theory studies choice of optimal behavior when costs and benefits of each option are not fixed, but depend upon the choices of other individuals. ALL-WinWin collaborative efforts require group decision support systems (GDSS) that enable the knowledge management community of practice to assure sustainable mutually-beneficial results. See also Calculating demand forecast accuracy Consensus forecast Critical design Design fiction Environmental impact assessment Forecasting Foresight Futures studies Morphological analysis Optimism bias Planning Prediction Prediction market Reference class forecasting Science fiction prototyping Strategic foresight Technology forecasting References Systems thinking Statistical forecasting Intelligence assessment