What does it mean that judgment is useful after observation is complete?

Evaluation has its place — after you have thoroughly observed.

Example: A product team runs a usability test. The designer watches a participant struggle with the checkout flow and immediately says, 'We need to simplify that form.' The team spends two sprints redesigning the form. Post-launch metrics show no improvement — because the real issue was unclear shipping cost language that appeared after the form, which three other participants also flagged. The designer's premature judgment directed the team's attention toward a plausible cause and away from the observations that would have revealed the actual one. Had the team first compiled all observations across all sessions before evaluating any of them, the pattern would have been obvious.

Try this: Choose a situation you need to evaluate — a technical decision, a team dynamic, a process that seems broken. Before you allow yourself to judge it, set a timer for fifteen minutes and write only observations: specific behaviors, exact data points, direct quotes, timestamps, measurable outcomes. Use the format 'I observed [fact]' for every line. No causal language ('because'), no evaluative adjectives ('poor,' 'excellent,' 'problematic'). When the timer ends, read your observations as if someone else wrote them. Only then, write your evaluation — and notice how it differs from the judgment you would have made at minute zero.