Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
In this paper, we study polynomial time approximation schemes (PTASes) for the no-wait job shop scheduling problem with the makespan objective function. It is known that the problem is MaxSNP-hard in the case when each job is allowed to have three operations or more. We show that if each job has at most two operations, the problem admits a PTAS if the number of machines is a constant (i.e., not part of the input). If the number of machines is not a constant, we show that the problem is hard to approximate within a factor better than 5/4. © 2005 INFORMS.
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
Thomas R. Puzak, A. Hartstein, et al.
CF 2007
Matthias Kaiserswerth
IEEE/ACM Transactions on Networking
Alfonso P. Cardenas, Larry F. Bowman, et al.
ACM Annual Conference 1975