1. A computer-implemented method for managing and modeling a segmented logistical process; the steps comprising: creating a computer model of said segmented logistical process with a plurality of segment models, each segment model representing a process segment within said segmented logistical process and comprising a mathematical expression including at least one parameter; and for each segment model: acquiring actual observed values associated with the process segment corresponding to said segment model; electronically comparing, by a computer, predicted values generated by the segment model with said actual observed values; electronically determining, by said computer, a score representative of the performance of said segment model from said comparison of the predicted values with said actual observed values; statistically determining, by said computer, new parameters for the mathematical equation associated with said segment model when said score indicates an unacceptable performance of said segment model; and electronically updating, by said computer, said segment model with said new parameters.