At Tech - yes, much more complicated at other schools. Tech Business majors use Calculus to derive inventory optimization equations, then program Excel to run linear optimization models from that equation. At other schools, the Business majors plug in numbers to the already solved model and use algebra to solve for an unknown.
Why does Tech teach like that? Because solving programs from first principals (which is the pervasive educational model at Tech) allows you to understand the assumptions that go into the model and make you a better problem solver.