Manufacturing control method for IC plant batch sequential machine
AssigneeVanguard International Semiconductor Corporation
InventorsHung-Ming Hsieh, Yirn-Sheng Pan, Horng-Huei Tseng
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Abstract
A method of operating a batch sequential machine in a manufacturing plant to optimize processing of lots of work through a plurality of series of processing stations which perform various functions comprising the following steps. Collect interval-times (I.sub.i,j) for processing of lots through individual processing stations. Form a matrix of reduced times for processing lots through the processing stations. Determine permutations of the reduced times for a series of combinations of the processing stations for performing required processing tasks. Select the combination of interval-times providing the maximum reduction of total processing time.
Claims31
A method of operating a batch sequential machine in a manufacturing plant subsequent to preventative maintenance steps to optimize processing of lots of work through a plurality of series of processing stations which perform various processing functions, comprising the following steps:
- providing a batch sequential machine in a manufacturing plant,
- providing a data processing system having memory means for data storage,
- providing central processing means for
- a) accessing data from said memory means,
- b) receiving data from data input means and
- c) supplying data to said memory means,
- collecting interval-times (I.sub.i,j) for processing of lots through individual processing stations,
- forming a matrix of reduced times for processing lots through said processing stations,
- determining permutations of said reduced times for a series of combinations of said processing stations for performing required processing tasks, and
- selecting the combination of interval-times providing the maximum reduction of total processing time.
A production scheduling apparatus for operating a manufacturing plant subsequent to preventative maintenance steps, comprising
- a data processing system having memory means for data storage,
- central processing means for
- a) accessing data from said memory means,
- b) receiving data from data input means and
- c) supplying data to said memory means,
- means for collecting interval-times (I.sub.i,j) for processing of lots through individual processing stations,
- means for forming a matrix of reduced times for processing lots through said processing stations,
- means for determining permutations of said reduced times for a series of combinations of said processing stations for performing required processing tasks, and
- means for selecting the combination of interval-times for maximum reduction of total processing time.
Dependencies are inferred from the claim text.