Which term best describes the practice of creating and maintaining wealth by carefully controlling trade?
Creating a hypothesis and testing it by eliminating or controlling other variables is a hugely powerful problem solving technique. For example, if I'm maintaining a website and it has an error on the homepage, the best way to figure out what is wrong and fix it is to take a guess at the root cause, test my guess and iterate.
There really is not a "best" in this case. If you are interested in building and maintancing computers, creating programs, maintaining and creating internet networks then computer engineering would be better for you. If you are interested in building, maintaining and analyzing electrical systems then electrical engineering would be better for you.