What screen-time data can (and can’t) tell you
Computer-activity data is one of the clearest windows into how digital work happens. But every window has edges, and confident wrong conclusions come from forgetting them.
What it tells you well
- Where time actually goes across apps and sites.
- Active versus idle rhythms across the day.
- Focus and context-switching patterns.
- Trends — is a person or team drifting up or down over weeks?
What it can't see
- Work off the computer — calls, whiteboards, thinking, physical tasks.
- Quality — an hour of brilliant work and an hour of noise both register as an hour.
- Context — a "distracting" site might be legitimate research; a quiet afternoon might be deep focus on one document.
The right posture
Treat activity data as the start of a question, not the end of one. It's excellent at showing you where to look and terrible as a lone verdict. Combine it with what you know about the person and the work, and it becomes genuinely useful. Use it alone as a scoreboard, and it will mislead you.
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