Authors:
Matheus Nohra Haddad
1
;
Luciano Perdigão Cota
1
;
Marcone Jamilson Freitas Souza
1
and
Nelson Maculan
2
Affiliations:
1
Universidade Federal de Ouro Preto, Brazil
;
2
Universidade Federal do Rio de Janeiro, Brazil
Keyword(s):
Unrelated Parallel Machine Scheduling, Iterated Local Search, Random Variable Neighborhood Descent, Makespan.
Related
Ontology
Subjects/Areas/Topics:
Artificial Intelligence and Decision Support Systems
;
Enterprise Information Systems
;
Industrial Applications of Artificial Intelligence
;
Operational Research
;
Problem Solving
;
Scheduling and Planning
;
Strategic Decision Support Systems
Abstract:
This paper deals with the Unrelated Parallel Machine Scheduling Problem with Setup Times (UPMSPST). The objective is to minimize the maximum completion time of the schedule, the so-called makespan. This problem is commonly found in industrial processes like textile manufacturing and it belongs to NP-Hard class. It is proposed an algorithm named AIV based on Iterated Local Search (ILS) and Variable Neighborhood Descent (VND). This algorithm starts from an initial solution constructed on a greedy way by the Adaptive Shortest Processing Time (ASPT) rule. Then, this initial solution is refined by ILS, using as local search the Random VND procedure, which explores neighborhoods based on swaps and multiple insertions. In this procedure, here called RVND, there is no fixed sequence of neighborhoods, because they are sorted on each application of the local search. In AIV each perturbation is characterized by removing a job from one machine and inserting it into another machine. AIV was teste
d using benchmark instances from literature. Statistical analysis of the computational experiments showed that AIV outperformed the algorithms of the literature, setting new improved solutions.
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