CPU time for large-scale instances
Posted: Sun Dec 17, 2017 5:49 pm
Dear friends, I have a question. Note that this inquiry is a question asked by a reviewer and I have to fully address his concern.
His concern: "The model is really complex with thousands of constraints. I have difficulty in imaging that the exact method needs few seconds..."
Let me explain the problem a little bit more. I have coded a MIP model in the GAMS and applied the Cplex as an exact method to solve instances. I am able to solve a relatively large-scale instance with about 23,000 decision variables and 4,000 constraints in less than a minute. I would like to ask for your clarification that how it would be possible to solve such a large-scale instance in less than one minute? Is there any specific reason?
I want to express our appreciation for your efforts in advance. In addition, I want to thank you for the privilege of your time.
His concern: "The model is really complex with thousands of constraints. I have difficulty in imaging that the exact method needs few seconds..."
Let me explain the problem a little bit more. I have coded a MIP model in the GAMS and applied the Cplex as an exact method to solve instances. I am able to solve a relatively large-scale instance with about 23,000 decision variables and 4,000 constraints in less than a minute. I would like to ask for your clarification that how it would be possible to solve such a large-scale instance in less than one minute? Is there any specific reason?
I want to express our appreciation for your efforts in advance. In addition, I want to thank you for the privilege of your time.