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For questions related to the use of a "big M" (large constant) in a mathematical modeling context, either in the objective function (to initialize the simplex method) or in constraints (to formulate logical constraints, to linearize constraints, and so on).

3
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2answers
I have a model for the no-wait flow shop scheduling problem, that utilizes the linear ordering variables, and there is a constraint with big-M. When I implement the model in CPLEX OPL, the model assig …
asked Jan 8 '20 by Mostafa
7
votes
1answer
There are two non-negative integer variables $q$ and $p$, where only one of them can take a positive value. To impose this relation, I write: \begin{align} q &\leq M(1 - y) \tag1 \\ p &\leq M(y) \tag2 …
asked Jan 18 '21 by Mostafa