Document and implement standards for time, synchronization, and correctness from legal, regulatory, contractual, and in-house observation needs. Define the specific reference time for each system, and use clocks linked to radio time broadcasts or GPS for logging systems. Use NTP or PTP to synchronize networked systems with the reference clock. Use two outside time references to improve reliability, and monitor clock differences among different cloud services and cloud and in-house services to reduce risks.
Conformance1
Tools for conforming to standards, goals and processes
