Yes, maintenance is not considered value added to the process. We once almost lost an entire days production, worth around 3.5 million. We managed to save it with extra QA testing at a cost of 150K. When asked, I designed a system and installed (with help) the system for less than 2500 total. Tell me that isn't value -added.
It really isn't worth getting into these days.
It really isn't worth getting into these days.