It is important for a time-series database to provide efficient storage, aggregation, and query of time-series data. Elevating a time-series database to a core operational technology of the enterprise, however, involves so much more. In this talk, I will explore important considerations that take a time-series database from being just another data-store, to a critical infrastructure for operational intelligence. I will explore challenges related to time, change management, incorporating asset models from the business domain, and integration with other operational technologies, like streaming-data platforms.