Abstract: Sensors are used to detect data representing the current state of at least one monitored phenomena. The time available for a human being to make a judgment concerning the detected phenomena is determined and an appropriate number of messages corresponding to the current state of the monitored phenomena is determined for output. At the same time, the priority of each of the messages to be displayed is determined. The number of messages deemed to be appropriate are output and displayed in the order of priority.

Abstract: A communication network system comprising a communication line network, a plurality of terminals connected to the communication line network, and a fuzzy control unit for allocating a right to access the communication network according to a fuzzy deduction process taking into account an operating condition of the system. This communication network system may consist of a local area network involving a polling process or a token passing process, a computer terminals systems, or a telephone exchange system. By using a fuzzy control process, an efficient utilization of available resources is made possible by taking into account operating conditions of the network as a whole, or each of the terminals.