Defence has changed their approach, as I think you're aware. Both the costing and the design cycle have to include in-service support for all major procurements so that you don't end up with a situation where you're just doing regulatory and minimal maintenance so you can keep equipment operating.
Again, it's something that I have more to learn about, but I do know that there are three lines of maintenance done on armed forces ships, navy ships: first, second, and third. The first line is done by the crew, the second line within the bases themselves at the fleet maintenance facilities, and the third line by industry. It's an integrated approach ensuring that the vessels and any equipment can be kept operating and functional for as long as possible.