How often should commercial building equipment be inspected?

[healeywisely]

Hi everyone,

I was having a discussion with a colleague who manages a commercial building, and we ended up talking about how much people rely on elevators every day without thinking about the maintenance happening behind the scenes.
It made me wonder how building owners and facility managers usually plan lift maintenance services. Is there a standard inspection schedule that most properties follow, or does it depend on the age of the equipment and how frequently it's used?
I've read that regular inspections can identify small issues before they become expensive repairs or unexpected downtime, but I'm interested in hearing real experiences rather than just general recommendations.
For those who have managed residential or commercial buildings:
How often do you schedule maintenance?
Have regular inspections actually reduced breakdowns?
Do you follow a fixed maintenance plan, or do you adjust it based on usage?
I'd really appreciate hearing your experiences and any practical advice you can share. Thanks!