Easy. Tort reform. One can then dump much of the "high-rel" traceability and bogus paperwork requirements. Procure off the shelf as much as possible. You see, it really does cost $250 to sell a hammer to the military. I know, I've been a manufacturing engineer in a MIL-Spec facility.
I'd also dump a lot of the hermeticity requirements in electronics manufacturing. I don't care if it's sealed, just make them guarantee it will work with their butts on the line. Hell, the qualification for automobile production is tougher in some respects.
I probably just whacked a couple of hundred billion right there. Seriously.
Maybe I'm just dense, but how would tort reform help the procurement process? I'm not making the connection here.
As for the rest of it, I'd let the military determine what they need and how it should be built, but while I have no problem with procuring off shelf stuff as much as possible, it's with the caveat that the provider must be an American company and must undergo strict Military Security screening to ensure that we're not opening ourselves up to sabotage. In short, I don't want a Stuxnet style attack on our systems to be possible because one of the vendors decided to use cut-rate hardware or software from China, such as has happened before.
Now, with that said, bring on the reform!