You want your maintenance team to maintain more, repair less. Each incidence of unplanned equipment repair, typically the result of a surprise failure, is evidence of a maintenance failure. So the higher your ratio of maintenance to repair, the more successful you are.
Some repairs are part of the maintenance process. For example, the mechanics replace worn, but still serviceable, seals before the seals leak. They may do this on a schedule (X hours of operation) or based upon some con