Are you looking for anything special when buying a components manufacturer?

It's such a straightforward business, but its competitive with some major overhead. The model to me is: There's this drawing in x material that that needs to be made to a specific size, and this is how much its going to cost. Besides the contracts, profits, is there something within the company's systems that make it more buyable than not? Example some form of software or way to create a more streamlined approach with less people involved? Is having multiple suppliers a +/-? Perhaps if the business is run more as a trading company does that create more upside?