The following points summarize best practices with indicator constraints in Callable Library applications:
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Use indicator constraints when Big M values in the formulation cannot be reduced.
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Do not use indicator constraints if Big M can be avoided.
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Do not use indicator constraints if Big M is eliminated by preprocessing. Check the presolved model for Big M.
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If valid upper bounds on continuous variables are available, use them. Bounds strengthen LP relaxations. Bounds are used in a MIP for fixing and so forth.
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