Sample frameDay 191·Hiring · Evidence

Morning. Before you write a single line of the advert, you need twenty stories.

Hiring.

The Critical Incident File

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The question

The advert for this role is probably half-drafted already, in a document or in your head: can you name one specific thing the last good person in that seat did, on one specific day, that the last bad one wouldn't have? Adjectives are what you're left with when nobody wrote the stories down.

The idea

John Flanagan ran the Aviation Psychology Program for the US Army Air Forces during the Second World War, and one of its first jobs was to work out why so many candidates were failing flight training. The reasons on file were useless — lack of inherent flying ability, poor judgement, unsuitable temperament — every one a label dressed up as an explanation. So he changed the question. Instead of asking instructors what a good pilot was like, he asked them to describe particular occasions: what was happening beforehand, exactly what the candidate did, and what followed from it. Classify a few hundred of those and the requirements of the job assemble themselves out of evidence. Flanagan, who founded the American Institutes for Research in 1946, set the method out as the Critical Incident Technique in Psychological Bulletin in 1954, and it's been used to build job requirements, training courses and rating scales ever since. What makes it work isn't the paperwork; it's the direction of travel. Ask people what a role needs and you get their theory of the role, usually a portrait of themselves on a good day. Ask them what happened, and you get the job.

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