Another challenging instance during 'busy' times is the ever-increasing practice of putting the TSR's out of 'wrap up' time 2 minutes after a call has ended.
MG: What was the most challenging instance where someone insisted that you "got it wrong"?
We also present a new set of large challenging instances, since previous sets do not allow to determine significant differences among advanced metaheuristics.
Therefore, it is of interest to evaluate to what extent a standard solver like Cplex can be used to solve more challenging instances.
In addition, we propose a hybrid SA/MIP method that combines the advantages of the pure methods on the challenging instances.
For the 56 most challenging instances with unknown optimal results, BLS succeeds in improving 49 and matching one best known results within reasonable time.
Besides a remarkable computational efficiency, the ease of implementation and capability of locating promising solutions for challenging instances of practical design optimization are amongst the remarkable features of the proposed algorithm.
Furthermore, we introduce 11 randomly generated instances to further evaluate the efficiency of the hybrid algorithm, and we make these computationally challenging instances publicly available to other researchers for benchmarking purposes.
OSAT can handle challenging instances where incomplete and unbalanced sample collections are involved as well as ideal balanced RCBD.
It can handle challenging instances where incomplete and unbalanced sample collections are involved as well as ideally balanced designs.
