(Stich et al., 2000). Neurons are organized in layers that process the input information and pass it to the following layer. The processing ability of the network is stored in the inter unit connection strengths (or weights) that are obtained through a process of adaptation to a set of training patterns (Fernandez et al., 2007). Methods based on ANNs seem particularly appropriate in a number of applications, owing to their ability to predict results by learning from the historical data sets of the problem without knowing the interactions among parameters, even if these are highly nonlinear. This ability of ANNs to predict relationships between input variables and their corresponding outputs in a complex biological system has resulted in some inspiring successes (Sharma et al., 2007).