# Operations Research Stack Exchange Community Digest

## Top new questions this week:

### What is the performance improvement when using semi-continuous variables instead of binary + continuous variable pair?

I have a MILP model that solves a master production schedule including capacity decisions. In the model I have a production quantity that should either be 0 or at least the amount that can be produced ...

mixed-integer-programming modeling

### Multi-period linear dynamic programming with differing in-period dependencies and changes

I’m not sure if I’m wording this right but in a nutshell, my problem is: I’m modelling potential actions a boat owner can do to their boat. Let’s say he wants to know over the 50 year lifespan of the ...

mixed-integer-programming linear-programming scheduling dynamic-programming

### Can I use 'SCIP' solver for PYOMO?

I have an MINLP problem to solve where I was initially using 'ipopt' solver but the solution was not sticking to 'binary/boolean/integer' domain type for a variable. I am not sure which free solver ...

optimization python combinatorial-optimization pyomo