Ronald van der Velden

Yes it will - Gurobi presolve algorithms will remove them from the model for you. The only downside is that you first spend the time and memory to add them. If there is not too many of those variab...

In fact, you can simplify further and not introduce \(r_t\) at all. Just use two indicator constraints to ensure \(p_t=p_{t-1}+w_t \cdot C\) when \(x_t=0\) \(p_t=0\) when \(x_t=1\)

Hi Sudheer, Indeed this method is not available in C#. However, the Python function is based on a collection of attributes that are all available in C# as well. Have a look at the section "Solution...

Hi Ruben, Thanks for posting to the forum! Here are some thoughts about your log output and model; hope this helps! The warnings relate to the “Coefficient statistics” at the top of your log outpu...

Apologies, something went wrong there - I just added the link above.

Do the solutions you found, only differ in the value of continuous variables or also in binary/integer variables? See this article for some limitations, e.g. how we consider whether two solutions a...

Ah... one problem is that if the difference between demand and the smallest vehicle is large enough, that constraint can never be satisfied. For example, with demand=31 and capacity=15, you have: (...

Hi David,Consider setting the MIPGap parameter to 0.005 before solving. This will tell Gurobi to stop as soon as it finds a gap of 0.5%. You can then access the solution and the ObjVal and ObjBound...

So why Gurobi reject this as a initial solution? This you can learn by fixing the solution (set the lowerbound and upperbound of each variable equal to the start solution) and asking Gurobi to op...

Hi, this problem might occur if there are constraints around the boundary between the two years (e.g. if you have 3 shifts in a workforce puzzle on Dec 29-31 and 3 shifts on Jan 1-3, but maximum fi...