| US 7,577,485 B2 | ||
| Automobile manufacturing line input order planning apparatus | ||
| Hitoshi Onizawa, Hitachi (Japan); Masanori Sato, Hitachi (Japan); Kei Nakamura, Tokyo (Japan); Atsumi Ichikawa, Saitama (Japan); Hiroshi Soejima, Atsugi (Japan); Shinichi Sakagami, Kitakyusyu (Japan); and Yutaka Sanada, Yokohama (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan); Nissan Motor Co., Ltd., Yokohama-shi (Japan); and Hitachi Engineering Co., Ltd., Hitachi-shi (Japan) | ||
| Appl. No. 10/507,520 PCT Filed Feb. 27, 2003, PCT No. PCT/JP03/02195 § 371(c)(1), (2), (4) Date Apr. 06, 2005, PCT Pub. No. WO03/079124, PCT Pub. Date Sep. 25, 2003. |
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| Claims priority of application No. 2002-071985 (JP), filed on Mar. 15, 2002. | ||
| Prior Publication US 2005/0182505 A1, Aug. 18, 2005 | ||
| Int. Cl. G06F 19/00 (2006.01) | ||
| U.S. Cl. 700—100 [700/97; 700/103; 700/106; 700/216; 700/223] | 3 Claims |
| 1. A building sequence planning system for an automobile production line, said system comprising:
an input unit for inputting vehicle information of vehicles to be manufactured, the vehicle information including the number
of vehicles residing or accumulated between two processes,
a processing unit for deciding an optimum building sequence based on the vehicle information inputted through said input unit,
and
an output unit for externally outputting a building sequence schedule decided by said processing unit,
wherein said automobile production line is a mixed line including a first line and a second line respectively in parallel,
and a third line branching from said second line and joining with said first line,
wherein said processing unit includes an initial offline sequence preparing unit for preparing an initial vehicle building
sequence of the automobile production line based on the vehicle information input to said input unit, and operates to output
said optimum building sequence by (i) calculating an evaluation value from the vehicle information, including an initial automobile
building sequence, input to said input unit, and storing the evaluation value, (ii) calculating a new evaluation value from
another, new automobile building sequence, (iii) comparing the new evaluation value with the stored evaluation value, (iv)
adopting the new automobile building sequence when the new evaluation value is improved, (v) discarding the new automobile
building sequence when the new evaluation value is not improved, (vi) ending processing when repetitive searches have been
completed, and (vii) outputting a most recently adopted automobile building sequence as said optimum building sequence.
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