| 1. Coming soon.
2. Measurable element of a service, method or function. The real value of metrics is seen in their change over time. Reliance on a single metric is not advised, especially if it has the potential to affect User behaviour in an undesirable way.
(Source: ENISA - the European Network and Information Security Agency. BCM & Resilience Glossary)
3. Measurable element of a service process or function. (Source: OGC, Information Technology Infrastructure Library (ITIL) v3)