As well as having; proper documented (and tested) procedures and appropriate level of staffing/staff availability (not overburdened by juggling too many tasks and projects) - AND... keeping staff over several period/activity cycles, so they have actual experience performing the ongoing maintenance activities required. Oh - and heck, even a master calendar of "events" which need to be acted on, with - ya'know reminders and things...

Yeah - I have almost never seen any corporate or government environment actually take a "forward-thinking" approach to any of the above...