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SCHEDULING ON TWO PARALLEL MACHINES WITH TWO DEDICATED SERVERS

Part of: Operations research and management science

Published online by Cambridge University Press:  25 May 2017

YIWEI JIANG Open the ORCID record for YIWEI JIANG [Opens in a new window] ,
PING ZHOU ,
HUIJUAN WANG  and
JUELIANG HU Open the ORCID record for JUELIANG HU [Opens in a new window]
YIWEI JIANG
Affiliation:
College of Finance and Trade, Ningbo Dahongying University, Ningbo 315175, China email ywjiang@zstu.edu.cn School of Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China email hujlhz@163.com
PING ZHOU
Affiliation:
College of Humanities, Zhejiang Business College, Hangzhou 310053, China
HUIJUAN WANG
Affiliation:
School of Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China email hujlhz@163.com
JUELIANG HU*
Affiliation:
School of Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China email hujlhz@163.com
*
✉hujlhz@163.com
Rights & Permissions [Opens in a new window]

Abstract

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We study a nonpreemptive scheduling on two parallel identical machines with a dedicated loading server and a dedicated unloading server. Each job has to be loaded by the loading server before being processed on one of the machines and unloaded immediately by the unloading server after its processing. The loading and unloading times are both equal to one unit of time. The goal is to minimize the makespan. Since the problem is NP-hard, we apply the classical list scheduling and largest processing time heuristics, and show that they have worst-case ratios, $8/5$ and $6/5$, respectively.

Keywords

schedulingserveralgorithmworst-case ratiomakespan

MSC classification

Primary: 90B35: Scheduling theory, deterministic
Secondary: 90C27: Combinatorial optimization
Type
Research Article
Information
The ANZIAM Journal , Volume 58 , Issue 3-4 , April 2017 , pp. 314 - 323
Copyright
© 2017 Australian Mathematical Society 

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