Scheduling to minimize the coefficient of variation

Date
1996
Authors
De, P.
Ghosh, J. B.
Wells, C. E.
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
International Journal of Production Economics
Print ISSN
0925-5273
Electronic ISSN
Publisher
Elsevier
Volume
44
Issue
3
Pages
249 - 253
Language
English
Journal Title
Journal ISSN
Volume Title
Series
Abstract

In this paper, we address the problem of uninterruptedly scheduling a set of independent jobs that are ready at time zero with the objective of minimizing the coefficient of variation (CV) of their completion times. We first show that, for high processing time values of the longest job, a variance (V) minimizing schedule also minimizes CV. Using this equivalence, we next demonstrate the invalidity of an earlier conjecture about the structure of a CV-optimal schedule and proceed to establish the NP-hardness of the CV problem. Finally, drawing from our prior work on the V problem, we provide a pseudo-polynomial dynamic programming algorithm for the solution of the CV problem.

Course
Other identifiers
Book Title
Citation
Published Version (Please cite this version)