Which metric measures the average time between failures in a system?

The metric that measures the average time between failures in a system is the mean time between failure (MTBF). MTBF is a crucial performance metric used in reliability engineering to determine how often a system is expected to fail over a given period. It provides insight into the reliability of a system and helps organizations understand the expected uptime of their systems.

In addition, MTBF is useful for assessing the performance and durability of equipment and systems. A higher MTBF indicates a more reliable system, while a lower MTBF suggests that the system may be prone to frequent failures. This metric is particularly relevant in IT operations and cloud environments, where system reliability is critical for maintaining service availability and performance.

The other options refer to different aspects of system performance or security but do not specifically measure the time between failures. For instance, mean time to repair (MTTR) assesses the average time required to repair a system after a failure occurs, rather than the time between failures. Key risk indicators focus on identifying potential risks, and malware refers to malicious software, which does not relate directly to system failure metrics.