Operations | Monitoring | ITSM | DevOps | Cloud

How quickly can you restore service when an incident hits your system? Most IT teams are not slowed down by detecting incidents. The challenge starts after something breaks, when the goal is to bring services back online as quickly as possible. Modern systems are highly distributed. Alerts arrive from multiple tools, dependencies are complex, and it is often difficult to immediately understand what actually failed.

When thinking about Service Level Objectives (SLOs) and contractual Service Level Agreements (SLAs) for availability, I always like to put the percentages into concrete numbers. It’s easy to lose track of what’s meant when saying “99.95%” availability, and even more is lost when thinking how much harder it is to achieve 99.99% compared to 99.95%. On a monthly basis, and in concrete terms, 99.95% availability means you get 21 minutes and 55 seconds of downtime.

On May 7th and 8th, 2026, Amazon Web Services (AWS) experienced an outage affecting Amazon Elastic Compute Cloud (EC2) in the dreaded US East 1 region. The original region of AWS located in Northern Virginia, us-east-1 or just “US East” as it is known, has been the subject of some of the internet’s most high profile and destructive outages and remains Amazon’s least reliable region.

How to Draft, Customize, and Keep Service Level Agreements Defensible Most enterprises do not discover the weaknesses in their SLAs during the drafting process. They discover them during an incident review, a customer escalation, or a contract dispute, when the language that seemed reasonable at signing turns out to be too vague to measure, too broad to enforce, or disconnected from the operational data that would make it defensible.

Why Confusing Them Costs You More Than a Missed Target Every operations leader tracks KPIs. Every enterprise IT team has SLAs. Both involve targets, both involve measurement, and both surface in the same board reviews and vendor conversations. So it is not surprising that the two get treated as variations of the same thing.

A Practical Guide for Help Desk, IT Operations, and Enterprise SRE Teams A service level agreement template is only useful if it can be customized. The version that ships with your ITSM platform was designed to be generic enough to apply anywhere, which makes it precise enough to apply nowhere. The teams that maintain defensible SLAs are not the ones with the most sophisticated legal language.