In the architecture of the management functionality and performance, its decisional component has a privileged position. No other element has a more stressed managerial specificity and a greater impact in all the plans of its activities and results. There are the main reasons which determined the authors to do a detailed analyze of the elements which intervene in decisional process. To have as a result a well founded and opportune decision any decisional model had to acquire, process, interpret a larger volume of information, in a shorter period. These demands have directed the whole structure of this paper.