In this paper, we consider a class of scheduling problems that are among the fundamental optimization problems in operations research. More specifically, we deal with a particular version called job shop scheduling with unit length tasks. Using the results of Hromkovič, Mömke, Steinhöfel, and Widmayer presented in their work Job Shop Scheduling with Unit Length Tasks: Bounds and Algorithms, we analyze the problem setting for 2 jobs with an unequal number of tasks. We contribute a deterministic algorithm which achieves a vanishing delay in certain cases and a randomized algorithm with a competitive ratio tending to 1. Furthermore, we investigate the problem with 3 jobs and we construct a randomized online algorithm which also has a competitive ratio tending to 1.
Keywords: online algorithms, competitive analysis, job shop scheduling
@article{ITA_2012__46_3_329_0,
author = {Akveld, Meike and Bernhard, Raphael},
title = {Job shop scheduling with unit length tasks},
journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
pages = {329--342},
year = {2012},
publisher = {EDP-Sciences},
volume = {46},
number = {3},
doi = {10.1051/ita/2011132},
mrnumber = {2981673},
zbl = {1283.68158},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.1051/ita/2011132/}
}
TY - JOUR AU - Akveld, Meike AU - Bernhard, Raphael TI - Job shop scheduling with unit length tasks JO - RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications PY - 2012 SP - 329 EP - 342 VL - 46 IS - 3 PB - EDP-Sciences UR - http://geodesic.mathdoc.fr/articles/10.1051/ita/2011132/ DO - 10.1051/ita/2011132 LA - en ID - ITA_2012__46_3_329_0 ER -
%0 Journal Article %A Akveld, Meike %A Bernhard, Raphael %T Job shop scheduling with unit length tasks %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 2012 %P 329-342 %V 46 %N 3 %I EDP-Sciences %U http://geodesic.mathdoc.fr/articles/10.1051/ita/2011132/ %R 10.1051/ita/2011132 %G en %F ITA_2012__46_3_329_0
Akveld, Meike; Bernhard, Raphael. Job shop scheduling with unit length tasks. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 46 (2012) no. 3, pp. 329-342. doi: 10.1051/ita/2011132
Cité par Sources :