In a typical product mix model, where a company must decide how much of each product to produce to maximize profit, there are sometimes customer demands for the products. We used upper-bound...

In a typical product mix model, where a company
must decide how much of each product to produce
to maximize profit, there are sometimes customer
demands for the products. We used upper-bound
constraints for these: Don’t produce more than you
can sell. Would it be realistic to have lower-bound
constraints instead: Produce at least as much as is
demanded? Would it be realistic to have both (where
the upper bounds are greater than the lower bounds)?
Would it be realistic to have equality constraints:
Produce exactly what is demanded?