Patents by Inventor Sachiko Iwamoto

Sachiko Iwamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of production planning
    Patent number: 7444294
    Abstract: For planning a production plan which satisfies a plural number of target values of management indices, upon calculating out production amount, supply amount and/or transportation means of plural products, various kinds of target values of management indices and estrangement values thereof are set into restriction conditions when those restriction conditions are formulated into a linear programming problem, and then feasible production plan is calculated out, so that the estrangement between the management indices being calculated from executable solutions of the above-mentioned linear programming problems and the target values thereof comes to be minimal.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: October 28, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Tazu Nomoto, Sachiko Iwamoto, Mitsuhiro Enomoto, Katsunari Ikezawa
  • Production scheduling system
    Publication number: 20050131779
    Abstract: The present invention provides a master production scheduling system in which overstocked parts are disposed of with minimum loss.
    Type: Application
    Filed: January 10, 2005
    Publication date: June 16, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Koichi Kitamura, Sachiko Iwamoto, Kazuo Morita, Toshiaki Tomita
  • Method of production planning
    Publication number: 20010004520
    Abstract: For planning a production plan which satisfies a plural number of target values of management indices, upon calculating out production amount, supply amount and/or transportation means of plural products, various kinds of target values of management indices and estrangement values thereof are set into restriction conditions when those restriction conditions are formulated into a linear programming problem, and then feasible production plan is calculated out, so that the estrangement between the management indices being calculated from executable solutions of the above-mentioned linear programming problems and the target values thereof comes to be minimal.
    Type: Application
    Filed: December 18, 2000
    Publication date: June 21, 2001
    Inventors: Tazu Nomoto, Sachiko Iwamoto, Mitsuhiro Enomoto, Katsunari Ikezawa