Which statement most correctly describes a competent facility manager's responsibilities relative to operations and maintenance?

A competent facility manager's responsibilities center around ensuring that the facility operates effectively and efficiently while maintaining a focus on reliability and cost-effectiveness. The statement regarding developing the highest possible reliability at the lowest overall total cost is particularly relevant because it encapsulates the core principles of facilities management.

Facility managers must ensure that systems and services within the facility are reliable, which includes regular maintenance and timely repairs. This reliability is crucial for preventing costly downtime and ensuring that the facility can meet the needs of its occupants. Additionally, it highlights the importance of managing costs, as achieving high reliability should not come at an unsustainable price. Therefore, the focus is not just on costs alone but rather on balancing performance quality and economic efficiency.

In contrast, the other options, while important in their own right, do not encapsulate the essential blend of reliability and cost management that defines the core responsibilities of a facility manager. Developing an ownership strategy, determining occupants, and deciding on the facility's mission are components that can be relevant to the overall management of a facility but do not specifically address the operational and maintenance responsibilities that drive the day-to-day performance of the facility.