The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1998
Filed:
Feb. 06, 1996
Hiroaki Ishizuka, Osaka, JP;
Shigeru Matsumoto, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A variable F (a, n) defined by Equation (1) (wherein k (a, n) is a constant set on a step P (a, n) which is the nth step of a product a, Tave (a, n) is an average wait time for the same step as the step P (a, n) which is obtained from the past processing results, Tw1 (a, n) is a processing wait time which is a time difference between a processing end time for a step P (a, n--1) and a processing start time for the step P (a, n), N (a) is a final step for the product a, Te (a, N(a)) is a end time for a final step P (a, N(a)), Tout (a) is a target delivery date for The product a, and E (a) is the number of steps in which the product a is not yet processed) is set on all manufacturing steps of a product which is put in a manufacturing line. The processing start and end times for each step are determined in such a manner that the absolute value of the variable F (a, n) is smaller than a preset constant Fmax which is equal to or greater than 0 so that an initial manufacturing project is formed. The initial manufacturing project is corrected so as not to violate preset constraint conditions. Equation (1) equals: ##EQU1##