The executive interview is the most widely used selection method in senior hiring and the least predictive. It survives not because it works but because it is cheap, familiar, and easy to defend. A structured conversation can reveal how a candidate thinks about their past and how fluently they present it. It cannot reveal how they will behave when a decision is contested, when information is incomplete, or when the cost of being wrong is immediate. The gap between those two things is where interview-led hiring quietly fails.
What Interviews Measure Well
Interviews are not worthless. A well-run interview establishes whether a candidate can reason about their own experience, how they structure an argument, and whether they understand the commercial context of the role. For assessing communication and self-awareness, few methods are more efficient.
The error is in extending that competence to a claim it cannot support. Fluency in describing past decisions is treated as evidence of the judgement behind them, when the two are only loosely related.
The Performance Problem
A senior candidate arrives at an interview having rehearsed. They know the questions, the narrative, and the impression they intend to leave. Interviewers, meanwhile, form confident judgements quickly, and those early judgements tend to harden rather than update. Both effects push the conversation toward the candidate's best presentation rather than their characteristic behaviour.
Interviews also reward a specific kind of confidence. Candidates who speak fluently about complexity, who use the language of the sector, and who project certainty are consistently rated more highly than those who think slowly and qualify their answers. Yet the second group is often the one that reasons more carefully when the stakes are real, and the first is the one that can talk past a problem it has not actually solved.
The result is a method that measures performance under observation. That is a legitimate skill, but it is not the skill the role requires.
"An interview tests how well a candidate can describe their judgement. It rarely tests the judgement itself.
Why Structure Helps and Where It Stops
Structured interviews, with consistent questions and defined scoring anchors, measurably outperform unstructured ones. Standardising the conversation reduces the influence of rapport, similarity, and first impressions, and it is a genuine improvement over an open chat.
But structure improves the reliability of a weak signal. It does not convert self-report into observed behaviour. However consistently a candidate is asked about how they handle conflict, the answer remains a claim rather than a demonstration.
Closing the Gap
The remedy is not to abandon the interview but to stop asking it to carry the decision. Behavioural assessment places the candidate inside a realistic executive problem and observes what they actually do: how they sequence priorities, where they allocate scarce resource, and how they respond when a stakeholder pushes back.
The interview then does what it does well, assessing communication and context, while observed behaviour carries the weight it cannot. The two are complementary, and the order matters: evidence first, conversation to test it.
Taken together, the two methods cover different ground. The interview establishes context, ambition, and how a candidate reasons about their own history. Observed behaviour establishes what they do when that reasoning has to become a decision, with a cost attached, a stakeholder objecting, and no opportunity to revise the answer afterwards. Used in that order, each method is asked only for the evidence it can actually supply.