How many people should be assessed for each job opening?
Usually, the rule of thumb is that the higher the job, and the more money you are going to pay, the more candidates you want to assess. Also, there is a time element. If only one applicant is assessed and otherwise evaluated, and something unfavorable is found, your second choice candidate might have moved on and is no longer available. By allowing more than one candidate, with truly hirable potential, to be evaluated simultaneously, you will have true competition for the job, and ‘the best man will win.’ Also, the higher the level, the more you want to know about them, such as drug screens, background checks, etc. which take time.