Battletech, both the tabletop and the last PC game, do a decent job. The former mainly in some of the added rule books (I think Tactical Ops and Strategic Ops in the last edition, before there was one called Tactical Handbook) which even go as deep as covering things like Depot and Factory modifications to military hardware (in that case Mechs) that is generally speaking pretty much in line with how modern military systems are managed. There are some more abstract systems using pool points for ease of book keeping.

The PC game takes some short cuts for ease of use (improvements to the base dropship the merc unit is using) and is assuming spares and consumables are readily available. It is covering the basic principals rather well so.