A substantial number of companies use psychometric assessment as an aid to more effective recruitment.

The assessment will highlight key areas to be probed during the interview and point to issue where the interviewers will need to satisfy themselves.

A typical assessment will consist of intellectual, personality and motivational questionnaires. At higher levels, intellect is the most important factor which will determine success, however although intellect can be regarded as necessary, it may not be a sufficient qualification.
 
It is said that people are hired for ability and fired for personality but a professional assessment will identify characteristics that would cause the individual to fail or even to be dangerous.

Nobody will succeed in a role that does not interest them and for this reason the determination of primary motivational factors is important.
An interest in a particular role is extremely important for success, regardless of any ability in that particular area.