This paper proposes a negotiation simulation system based on genetic algorithms. Its purpose is to give negotiators some rational compromise for agreement in practice. Two negotiators talk about a subject. Each of them posesses a different opinion and view but has a common goal.A compromise in the negotiation is attempted through modifying the evaluation functions of negotiators. The modification is carried out by utilizing the searching mechanism of the classifier system to suggest the way of searching the compromise point in the negotiation. In particular, the following two means for production of the parent pool are defined and then the process of searching for a compromise point are implemented. (1)The first way is to prepare all the relevant individuals. (2)The second way is to generate individuals based on a probability distribution. The latter is a sufficiently efficient way to search a compromise compared with the former way. As a concrete example of the simulation, a decision situation where a group wants to buy a car is dealt with. This system can suggest each of the negotiators an efficient and suitable solution.

The basic principles of past DSSs are almost based on the decision-making model proposed by H.Simon. Consequently, the supports given by such DSSs are limited to individual decision making thus far. 0n the other hands, the DSSs which are requested for the future business Management are to support the team decision-makings based on their commonly owned information. That is why the DSSs based on the individual decision making do not get satisfactory results. Thus in this paper, we propose the new concept of DSS, called the organizational DSS, which supports the problem solving processes by teams supposed to be useful for the future business management. We give the detail explanations of the organizational DSS that has the model integration mechanism as an important constituent, and give its construction methods. Finally we construct a prototype of DSS for a real company as an application example.

Since the model proposed by Einhorn & Hogart (1985), the researches of information presentation order (IPO) effects have been conducted in terms of that model. But the individual differences in IPO effects have not been systematically analyzed yet. Present study investigates the impact of differences of the cognitive style(sensation-intuition) and the personality trait (self-monitering) to the effects of IPO.

The results show that the sensational coginitive style subjects, or high self-monitering subjects are more influenced by IPO than intuitive, or low self-monitering subjects.

In 80's, we recognized that organizations consisted of two parts-indivisuals as creators and systems by which governed them ,and that we must have systems so loose as to make organizations more creative, in the theorys of self-organization and organizational development.But, however indivisuals are inside already present systems, they can't create ideas to cange their organizations.

In this paper, we disucuss how indivisuals are out of already prsent systems, in the case of development of new products.