Hitachi, Ltd.

Hitachi Engineering Co., Ltd.

Yasuhiro Terada

Masakazu Yahiro

Haruki Inoue

Yoshiyuki Satoh

Hiroyuki Ichikawa

Hideo Yoshida

Noboru Abe

Akemi Ohtsuki

A planning system for quickly forming the optimum plan for a given planning problem, includes a setting unit for accepting the given planning problem; an optimization unit for creating an objective function which expresses an item intended to be minimized or maximized in the planning problem, and for executing a process which minimizes or maximizes a value of the created objective function; a storage unit for storing therein, at least, constant values which are required for the optimizing process; and a display unit for displaying a processed result of the optimization unit. The optimization unit performs a first function of calculating a difference value between the values of the objective function assumed in a last formed plan and a newly formed plan, and performs a second function of comparing the difference value of the objective function with the constant value set in the storage unit, and then substituting the last formed plan by the newly formed plan and setting the latter as a candidate for an optimum plan, on condition that the difference value of the objective function is smaller than the constant value.

Planning method and system

Growing community of inventors

Hitachi, Japan

Yasuhiro Terada