Structured interviews: the cheapest way to hire better
If you change one thing about how your company hires, change this. Structured interviewing is the best studied improvement available to most employers, it costs nothing to implement, and the majority of companies still do not do it.
What structured actually means
A structured interview has four properties:
- Every candidate for a role is asked the same core questions.
- The questions are defined in advance from the requirements of the job.
- Answers are scored against a rubric agreed before anyone interviews.
- Interviewers record their scores before discussing with each other.
An unstructured interview is a conversation that goes where it goes, after which people report a feeling. It is what most companies do, and decades of research in personnel selection have consistently found it a weak predictor of job performance, well below structured approaches and work sample tests.
Why unstructured interviews fail
They mostly measure how comfortable the interviewer feels with the candidate, which is not the same as capability.
Three effects do most of the damage. Interviewers form an impression in the first minutes and spend the rest of the conversation confirming it. Different candidates get different questions, so there is nothing to compare. And similarity bias means people rate candidates like themselves more highly, which quietly narrows who gets hired.
None of this is a character flaw. It is how judgement works without structure.
How to build one
Step 1: define what the job needs
List four to six competencies that actually matter. Not fifteen. For a support role that might be written communication, composure under pressure, problem ownership, and learning speed.
Step 2: write questions that get evidence
Past behaviour questions ask what someone actually did. "Tell me about a time a customer was angry and you were not able to give them what they wanted. What did you do?"
Situational questions ask what they would do in a realistic scenario from your workplace.
Both are far more useful than hypotheticals about self perception, such as asking someone to describe their greatest strength.
Step 3: agree the rubric first
For each question, write what a weak, adequate, and strong answer contains, before interviewing anyone. This is the step people skip and it is the one that does most of the work, because it forces you to define the standard rather than discovering it by comparison.
Step 4: score independently, then discuss
Each interviewer records scores and evidence before the debrief. Otherwise the most senior or most confident voice anchors the room and you get one opinion wearing several faces.
Add a work sample
The strongest single addition to a structured interview is a short, realistic sample of the actual work. Draft the reply. Reconcile the account. Review the code. Keep it short enough to respect people's time, and evaluate it against a rubric like everything else.
The objections
"It feels robotic." The structure is in the questions and the scoring, not in your manner. You can be warm and still be consistent.
"We do not have time." Building the rubric takes about an hour per role and is reused for every future hire. A bad hire costs vastly more.
"We trust our instincts." Instinct is what the research measured. It performed poorly. That is uncomfortable and it is still the finding.
The side benefit
Structured interviews are also fairer and easier to defend. Every candidate gets the same questions and is measured against the same written standard, which reduces the influence of bias and gives you a record of why you decided what you decided.
We build interview guides and scorecards with clients as part of a search. It is usually the change that improves their hiring most, and it keeps working long after our involvement ends.