Setting base stock levels using product-form queueing networks
Article Abstract:
A manufacturing system that makes different products in a make-to-stock mode is examined. A simple pull-type production control policy for a multiproduct make-to-stock kanban environment is proposed. This requires the release of a new unit of a product onto the shop floor when the total work-in-process and finished goods inventory for the product is below a set base stock level. Under the assumption that the work-in-process inventory possesses a steady state distribution and that different costs incurred for carrying in-process exist, it is demonstrated that the cost minimizing base stock level for each product is an important fractile of the steady state distribution of the total work-in-process inventory of the product. Specific formulas for the base stock levels under standard product-form assumptions are developed through the manipulation of the relationship between the make-to-stock system and an open queueing network.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1996
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A broader view of the job-shop scheduling problem
Article Abstract:
A complicated job-shop scheduling problem is considered. This problem involves three scheduling decisions: due-date setting, job release and priority sequencing, as well as several performance measures including the reduction of the work-in-process (WIP) inventory and the lessening of the due-date lead time of jobs. A two-step solution to this scheduling problem is developed. The first step involves reducing the WIP inventory by releasing and sequencing jobs depending on the accomplishment of jobs at a given rate. The second step requires the scheduling of due dates in such a way that will cut due-date lead time, depending on the constraint on the proportion of late jobs. Several principles for enhancing the performance of a two-station job-shop are presented.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1992
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Due-date setting and priority sequencing in a multiclass M/G/1 queue
Article Abstract:
This study examined the relationship between setting job due-dates and sequencing jobs according to priority in a multiclass M/G/1 queueing system. New management policies that would deal with the problem of simultaneous job-setting and priority sequencing were proposed and tested against conventional due-date management policies in a simulation study. The proposed policies were found to be more effective.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1991
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