📄SLA

NEW

Also known as: Service Level Agreement

Formal agreements that define service performance commitments, measurement, responsibilities, and remedies between provider and customer.

DESCRIPTION

Service level agreements codify expected service performance, covering metrics like uptime, response times, and support windows. They guide monitoring, reporting, and escalation processes, and often specify penalties or credits for non-compliance. SLAs align business expectations with technical capabilities and are foundational to vendor contracts and internal platform teams. In modern SRE practices, SLAs are complemented by SLOs and SLIs to create actionable reliability goals. Clear SLAs reduce disputes and improve trust by defining measurement methods and scopes.

ALTERNATIVE DEFINITIONS

Wikipedia

A service-level agreement (SLA) is a commitment between a service provider and a client.

Highlights contractual commitment in provider–client relationship.

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Microsoft Learn

Azure service-level agreements (SLAs) describe Microsoft’s commitments for uptime and connectivity.

Focuses on cloud service availability and connectivity guarantees.

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Google SRE Book

An SLA is a business agreement with users that sets expectations and consequences regarding service reliability.

Places SLAs in the broader context of reliability governance and user expectations.

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IBM

A service-level agreement (SLA) is a contract between a service provider and its customer that details the services to be provided and the expected level of service.

Emphasizes documented services and expected service levels in a formal contract.

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AXELOS (ITIL)

Service level agreement (SLA): A documented agreement between a service provider and a customer that identifies services and expected service levels.

ITIL glossary framing, focuses on documented agreement and identified services.

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Microsoft Azure

The SLA describes Microsoft’s commitments for uptime and connectivity.

Vendor SLA summary emphasizes uptime and connectivity commitments for cloud services.

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RELATED TERMS

Service Level Indicator Uptime Availability Reliability Error Budget Incident Management Key Performance Indicator Contract Mean Time To Repair Site Reliability Engineering Change Management

COMPETING TERMS

Service Level Objective OLA Operational Level Agreement Experience Level Agreement

KNOWLEDGE AREAS

Observability & Telemetry Software Engineering Cloud Platform & Tooling Data Services Infrastructure Collaboration

TARGET AUDIENCE

IT Manager DevOps Engineer Cloud Architect Software Architect Product Owner IT Project Manager Chief Technology Officer Chief Information Officer Application Administrator

EXTERNAL SOURCES

• Wikipedia - Service-level agreement
• Microsoft - Azure SLAs official documentation
• Google Cloud - Google Cloud SLAs page
• AWS - AWS service SLAs
• Google SRE - SLOs and SLAs guidance
• Microsoft Learn - Azure architecture guidance on SLOs and SLAs
• Google Cloud - SLI/SLO/SLA distinctions
• AXELOS - ITIL 4 perspective on SLAs

TOP QUESTIONS

What should an SLA include?

Clear metrics (uptime, latency), measurement methods, reporting, responsibilities, escalation paths, and remedies or credits for breaches.

Category: Requirements

How do SLAs relate to SLOs and SLIs?

SLIs measure behavior, SLOs set internal targets, and SLAs formalize external commitments with consequences.

Category: Concept

Why are SLAs important?

They align expectations, reduce disputes, and drive engineering priorities to meet business needs and compliance obligations.

Category: Relevancy

What is a common mistake with SLAs?

Setting unrealistic targets without considering architecture and cost. Overly vague definitions create ambiguity and conflict.

Category: Mistakes

What risks exist with aggressive SLAs?

Higher costs, operational stress, and reduced agility. Breaches can damage trust and incur penalties.

Category: Risk

How to negotiate SLAs effectively?

Align with business goals, pilot realistic baselines, consider error budgets, and include fair remedies and review cycles.

Category: HowTo

What is a hot topic around SLAs?

Error budgets and SRE practices influence SLA design, balancing reliability with velocity.

Category: Topic

How are SLAs monitored?

Use observability platforms to track SLIs, generate reports, and alert on SLO breaches that may affect SLA compliance.

Category: Management

Are SLAs legally binding?

External SLAs are contractual commitments, while internal agreements (OLAs) guide team collaboration without customer-facing penalties.

Category: Regulation