  In this paper we build a method to optimize Multi-Year Prospective Budgets.
First we present a systemic model of Local Community Finances. Then, from two
acceptable Multi-Year Prospective Budgets the method implements a Genetic
Algorithm to generate a collection of admissible Multi-Year Prospective Budgets
among which Decision-Makers can choose. The method is tested on simplified
cases and on in operational situation and gives satisfactory results.
