Distinguish platform SLIs, SLOs, and implementation metrics before choosing reliability work.
The move: define what reliable means to the platform user before arguing about the implementation. Start with the user journey A platform SLO should describe whether a developer can complete a job: create an environment, deploy, roll back, retrieve logs, rotate a secret, or provision a database. The job is the surface where trust is won or lost. Choose a small number of SLIs Good SLIs are measurable and tied to the journey. For a deployment platform, useful SLIs might be successful deploy completion, time from approved change to production, rollback initiation time, and percentage of failures with actionable diagnostics.…
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