SLO, APM Availability?

With the new SLO feature what is APM availability actually monitoring/measuring? It is not mentioned in the documentation and isn't clear when using it what it defines as a good event vs a bad event.

Hi @GregoryJC,
We are filtering all the APM documents with

{ term: { 'metricset.name': 'transaction' } },
{ terms: { 'event.outcome': ['success', 'failure'] } },

Then the good events are the documents with event.outcome:"success" and the total events is a match_all

If the code can help: kibana/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_error_rate.ts at main · elastic/kibana · GitHub

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Perfect, thank you Kevin.