Most important decisions concerning city management are taken after long and often protracted negotiations between protagonists. This is the very basis of democratic city rule and corresponds fully to the importance of local administration in modern industrial countries.

The goal of this research is to simulate the preliminary negotiations held between actors involved in planning decisions, and to estimate their different gains. Since negociations involve an extrememly large number of transactions, only the computer has the power to scan possible bargains and retain the ‚ best é ones. This paper discusses the conditions a procedure simulating negotiations must meet and proposes such a software called Negoce .