We may also want to project trends based on the diagnosis, to see how the situation may change. This is the forecasting process. In many situations, the primary need is to build a reliable forecast in order to determine whether the difficulty will disappear on its own, or will get worse and require action. The problem representation and diagnosis processes are linked to forecasting, which usually requires mental simulation.
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Problem presentation can but need not include simulations of the past and the present. These help us better understand the problem and if it is worth doing somethomg about it.
