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Lot streaming in multi stage shops

Authors: Şen, Alper;

Lot streaming in multi stage shops

Abstract

In this thesis, a number of lot streaming problems in flow, open and job shops are investigated. Lot streaming is the process of splitting a job to al low for overlapping of its operations on various machines resulting in shorter completion times. When there is a single job, the problem is to find the size of the transfer batches (`subiots`) which minimizes a given performance mea sure (e.g., makespan, mean flow time). Multi-job problems are harder, since sequencing and sizing decisions must be made simultaneously. Most of the cur rent research in lot streaming is concerned with minimum makespan problems in flow shops. In this study, other performance measures and shop structures are also analyzed. Optimal sublot sizes are derived for the single job two ma chine flow shop mean flow time problem. Solution methods are proposed for the minimum makespan problem in open shops both for multiple job and single job cases. Key words: Scheduling, Lot Streaming, Flow Shops, Open Shops, Job Shops m

Bu çalışmada çok makineli atölyelerde kafile aktarma problemleri incelenmiştir. Kafile aktarma bir işin bölünerek değişik makinelerde işlemlerinin çakıştırılmadı yoluyla akış zamanlarının azaltılmasıdır. Sadece bir tek iş olduğunda, problem, verilen performans ölçütünü enazlayan transfer kafilelerinin büyüklüklerinin bulunmasıdır. Sıralama ve büyüklük kararları eşgüdümlü alınması gerektiğinden, çok işli problemlerin çözümü daha güçtür. Bu konuda yapılan araştırmaların çoğunluğu akış tipi atölyelerde çizelge uzunluğu problemlerini incelemektedir. Bu çalışmada ise, değişik performans ölçütleri ve atölye tipleri incelenmektedir. Tek işli, akış tipi, iki makineli atölyelerde ortalama akış süresini enazlayan transfer kafilesi büyüklükleri hesaplanmaktadır. Çok işli ve çok makineli atölyelerde çizelge uzunluğu problemleri için çözüm yöntemleri önerilmiştir. Anahtar sözcükler: Çizelgeleme, Kafile Aktarma, Atölye Tipi Üretim iv

59

Country
Turkey
Related Organizations
Keywords

Flow Shops, Lot streaming, Production scheduling., Scheduling, Production scheduling, TS157.5 .S46 1994, Multi machinery systems, Endüstri ve Endüstri Mühendisliği, Open Shops, Scheduling (Management)--Mathematical models, Scheduling (Management)--Mathematical models., 650, Industrial and Industrial Engineering, Job Shops, Lot Streaming, Job shops.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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