An unstructured interview is a conversation. It goes where the rapport takes it, which is usually somewhere pleasant, and it leaves the interviewer feeling they got a good read on the person.
The feeling is the problem. What a free-flowing interview reliably measures is similarity to the interviewer, and that correlates with a lot of things that are not job performance.
What "structured" actually requires
- Every candidate gets the same questions.
- In the same order.
- Assessed against criteria written down before anyone was interviewed.
- Scored independently, before the panel talks.
That is the whole method. It is not sophisticated and it is not enjoyable, which is roughly why it stays unpopular despite the evidence.
Where async rounds help by accident
A recorded screening round enforces three of those four whether you meant it or not. Everyone gets the same questions because you wrote them once. Everyone gets them in the same order. Nobody gets a warmer version because they mentioned the same hometown.
The fourth — scoring against a bar you set in advance — is still on you. It is also the one that does most of the work.
What you give up
Structure costs you the productive tangent. Sometimes the best thing in an interview is the thing nobody planned to ask, and a rigid round will not find it.
Which is an argument for structuring the screen and leaving the later rounds looser, not for abandoning structure everywhere. Use the recorded round to decide who to talk to. Have the wandering conversation with the shortlist, where the tangent is worth the time.
Structure early, freedom late. The reverse is how good candidates get filtered out by a bad first impression.
