Incident metrics & SLAs – All Quiet Glossary

What is MTBF? (Meaning, Formula and Benchmarks)

Tue, 18 Aug 2026 00:00:00 GMT

MTBF meaning, formula and benchmarks. MTBF (Mean Time Between Failures) is the average time a system runs between failures — learn how to calculate it, how it differs from MTTR and MTTF, and what counts as a good MTBF.

What is an Error Budget?

Thu, 23 Jul 2026 00:00:00 GMT

Learn what an error budget is in SRE, how it relates to SLOs and SLIs, and how teams use it to balance shipping speed with reliability.

What is MTTD? (Mean Time to Detect)

Thu, 23 Jul 2026 00:00:00 GMT

Learn what MTTD (Mean Time to Detect) means, how it differs from MTTA and MTTR, and how faster detection shortens incident impact.

What is Service Level Transparency?

Sun, 05 Jul 2026 00:00:00 GMT

Learn what service level transparency means, why it matters during outages, and how status pages help teams demonstrate SLA compliance.

What is a 500-Error Rate? (Tracking Server-Side Failures)

Mon, 11 May 2026 00:00:00 GMT

A 500-error rate measures how often your servers return HTTP 500. Learn why tracking it matters for deployments, SLIs, error budgets, and incident response.

What is a Service Level Indicator (SLI)?

Mon, 13 Apr 2026 00:00:00 GMT

A Service Level Indicator (SLI) is a quantitative measure of a specific aspect of service level used to assess system health objectively.

What is Downtime?

Tue, 31 Mar 2026 00:00:00 GMT

Downtime is any period when a service is unavailable or cannot perform its core function; fast detection and resolution is a competitive advantage.

What is MTTC (Mean Time to Control)?

Tue, 31 Mar 2026 00:00:00 GMT

MTTC (Mean Time to Control) tracks containment time after detection—a key metric for limiting impact of outages and security events.

What is a Service Level Objective (SLO)?

Tue, 10 Mar 2026 00:00:00 GMT

A Service Level Objective (SLO) is an internal reliability target for performance, availability, or quality that underpins SLAs and error budgets.

What is an SLA (Service Level Agreement)?

Mon, 02 Dec 2024 00:00:00 GMT

An SLA (Service Level Agreement) is a contractual commitment between a service provider and a customer that defines expected service levels, including availability, responsibilities, and penalties for non-compliance.

What is Uptime?

Mon, 02 Dec 2024 00:00:00 GMT

Uptime measures how long a system, service, or application remains operational and available over a given period.

What is MTTA?

Wed, 09 Oct 2024 00:00:00 GMT

MTTA, also referred to as Mean Time to Acknowledge, is one of the most important incident repsonse metrics.

MTTA vs. MTTR

Wed, 09 Oct 2024 00:00:00 GMT

The difference between MTTA and MTTR and why both are very important metrics for your incident response.

What is MTTR?

Wed, 09 Oct 2024 00:00:00 GMT

MTTR, or Mean Time To Resolution, tracks the average time is takes to resolve incidents after they pop up.