This is the gold standard in data collection - deliberately crafted event data that serves a specific analytical purpose.
KPIs, Key Results, Metrics, or essentially anything that's on a time series that moves up and down. You can add alerts based on deviations, thresholds, or lack of data, but generally the data is deliberately crafted to ensure the proper functioning of a system.
## Observational Data - the default
Everyone seems to just use "data exhaust".
Resist the urge to boil the ocean when it comes to data collection, and you'll find that you'll accelerate the rate of data-driven decision making with a much smaller maintenance burden on your data infrastructure.