I think we use the same PPBE process at NASA. Many of the systems and procedures that NASA uses are are defense-derived. If it's anything like what we do, then it's a total mess and we mostly just go through the motions with it, knowing it doesn't actually reflect reality and it's kind of a waste of time for everybody.
However, it's risky to assume that scrapping a crappy system will result in things being better. The current shitty system was almost certainly the result of scrapping and replacing something else that had some problems.
Anyway, hopefully this works well, because we'll probably end up copying it at NASA.
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