Hitachi, Ltd.

Hitachi Microcomputer System, Ltd.

Hitachi Microcomputer Engineering, Ltd.

Keiichi Hara

Kazuhiro Kawashima

Norihisa Komoda

Michiko Oba

Kichizo Akashi

Kenzo Kurihara

Tetsushi Tomizawa

Kouichi Taniguchi

Noriko Komori

The computer aided planning support system of this invention is constructed of a planning information input device from which an object data for making a plan is inputted; an object data storage unit for storing the inputted object data; a planning unit for making a plan by reading the object data stored in the object data storage unit and processing the read-out data in accordance with a planning program; a planning data storage unit for storing the data associated with the plan made by the planning unit; a planning data processing unit for processing the planning data stored in the planning data storage unit in accordance with a predetermined scheduling function and sending the processed data to the planning unit; and a planning information output device for outputting the planning result generated by the planning unit in the form a user can use it.

Computer aided planning support system

In a method for determining an optimum scheduling in a computer-aided scheduling system the data associated with a schedule to be generated is previously stored in a memory data. A strategy decision table showing therein one or more scheduling strategies suitable for a plurality of the states in a scheduling process is prepared. An optimization definition table indicating degree of improvement precedence or precedence order of the scheduling strategies of the evaluation items, where degree of improvement precedence is defined as degree of improvement of evaluation value of he evaluation item in changing of the scheduled strategy, is prepared. A schedule is generated by repetition of selecting and executing the scheduling strategies by using the strategy decision table. The other schedules are generated by changing the scheduling strategy selected in the state of the scheduling process by using the optimization definition table. An optimum schedule having the best evaluation value is selected.

Method for determining optimum schedule in computer-aided scheduling

In a scheduling system, constraints changing based on situations and scheduling know-how are implemented according to the knowledge engineering method, whereas computations for the concrete, optimal allocation are conducted according to the mathematical programming method. As a result, there can be achieved a scheduling which can easily cope with changes in the scheduling know-how and constraints and which has a high maintainability and a high computation speed.

Work scheduling method

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Kawasaki, Japan

Keiichi Hara