SLO Design in Practice: From Business Goals to Technical Metrics
Overview The first dilemma many teams face when practicing SRE is: they know what an SLO is, but they don’t know how to set one. They either copy Google’s 99.99% or pick an arbitrary 99.9% — only to find that the number neither reflects user experience nor drives engineering decisions. A good SLO isn’t plucked from thin air. It’s derived from business goals through a series of engineering methods: user journey analysis, metric selection, value calibration, multi-tier design, and regular review....