What is a 360 review and does it work?
A 360-degree review collects feedback on someone from multiple perspectives — manager, peers, direct reports and sometimes clients — rather than from a line manager alone. The name describes the full circle of viewpoints.
The rationale. A manager sees only part of someone's work, and particularly little of how they treat people with less power. A manager's view may show a highly effective performer; direct reports may describe someone difficult to work for. Both can be true, and only one is visible in a conventional review.
What the evidence says. The picture is genuinely mixed, and this is worth stating plainly.
What works:
Used purely for development, with results given confidentially to the individual and supported by coaching, 360 feedback can produce measurable improvement — particularly for behaviours the person was unaware of.
Self-awareness gaps are real and useful. The difference between self-rating and others' ratings is often the most informative output, and people who over-rate themselves tend to be rated lowest by others.
Where it fails:
Tied to pay or promotion, it degrades quickly. Reviewers inflate ratings to avoid harming a colleague, or deflate them where they compete. Reciprocal arrangements emerge. This is the single most common implementation error.
Meta-analyses find inconsistent effects on subsequent performance — some people improve, some do not change, and some get worse, particularly where feedback is delivered poorly or perceived as unfair.
Anonymity is often illusory in small teams, so feedback becomes cautious and uninformative.
Rating inflation compresses everyone into a narrow band.
Vague feedback is unusable. "Could communicate better" gives nothing to act on.
What improves it: separating it entirely from pay decisions; asking for specific behavioural examples rather than ratings; sufficient reviewer numbers to protect anonymity; a facilitated conversation about results rather than a report emailed over; and a genuine follow-up plan.
Negative feedback delivered without support frequently produces defensiveness rather than change.