A Service Level Indicator (SLI) is a quantitative metric that measures a specific aspect of service performance, such as availability, latency, or error rate. SLIs provide the raw data used to evaluate reliability. Also known as reliability indicators, SLIs are the foundation of SLOs and SLAs.
Without accurate SLIs, reliability goals are meaningless. Poorly chosen indicators can mask real user issues or create false confidence. Well-defined SLIs ensure teams measure what truly matters to users.
SLIs are derived from monitoring and observability data. Metrics are collected continuously and calculated over a defined time window to assess current service performance.
BuildPiper helps teams track SLIs by correlating observability metrics with deployments and environments. This ensures reliability indicators are interpreted in the context of recent changes and releases.
A metric is any measurement, while an SLI is a carefully chosen metric that reflects user experience.
Yes. SLIs should evolve as systems, users, and business priorities change.
BuildPiper provides contextual visibility into SLIs by linking them to release and deployment activity.