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SLA & error budget calculator

Serial dependencies multiply. See what your chain actually achieves, whether your target is reachable at all, and which dependency owns most of the downtime.

Your target

Over a

Serial dependencies multiply, so a chain is always less available than its weakest member — which is why a service depending on five things at 99.9% cannot itself be 99.9%. Redundancy assumes independent failure, the generous case; instances sharing a region, a pipeline or a certificate expiry fail together. Treat the result as a ceiling.