The most common evals mistake: skipping error discovery and measuring the wrong thing

FinanceYF5 · x · 2026-09-23

Part 5 of an evals thread: the most common mistake teams make is skipping error discovery and jumping straight to writing metrics. User logs are hard to review and metrics are easy to automate, but setting metrics too early often measures the wrong problem. Error discovery is like product research—find the problems worth solving first, then decide what to test. When time is limited, prioritize this step.

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