SELF-CHECK
For 100000 eligible requests and a 99.9% success target, how many failures are allowed by this simple request-based budget?

REFERENCE REASONING
100 failures. If 150 failures occur, the target is missed for that window. This is a request-based model, not a time-based uptime calculation.

This is a reasoning reference for the supplied fictional case, not an executed app or tested cloud deployment. Alternative approaches are valid when supported by stated assumptions and evidence.
