In this session, titled “From Chaos to Consistency: Implementing a System to Manage 1M+ SLOs in a Large Enterprise,” we will explore the process of standardizing Service Level Objectives (SLOs) within a large organization known for its professional networking platform. We will begin by examining the initial state of disparate and inconsistent availability measurements across various services. The session will then delve into the initial challenges we faced, including a significant drop in our availability metrics. We will discuss our adoption of OpenSLO for defining SLOs and the subsequent improvements that led to restoring our user-facing availability to 99.9%. Our scalable system now supports millions of SLOs, thousands of microservices, and diverse client applications, processing billions of metrics to derive accurate Service Level Indicators (SLIs). Attendees will gain insights into the strategies and lessons learned from this journey, providing practical guidance for implementing SLO standardization in their own organizations.