Present forecasting approaches typically involve selecting possibilities from an assortment of established techniques [16, 17]. Many techniques are identified by genetic names that have many variants. Makridakis, Wheelwright, and McGee [18], for example, offer six basic exponential smoothing models ranging from the unadorned Single Exponential Smoothing version to Winters’ Three-Parameter Trend and Seasonality Method. Similarly, econometric models can be defined to include any models with a series of simultaneous multiple regression equations. Other experts, meanwhile, feel that econometric models consist of any simple, multiple, or systems of multiple, or systems of multiple regression equations that are used to predict economic states [19]. A common grouping of some names is presented in Table 26.1.