Psychic costs in medical education: do they exist?

Imagine the following scenario: You are head of the medical education unit at a large teaching hospital. You have had a contract with an external organisation that provides assessment services, but that contract has just run out and you now need to decide whether to renew or go with an alternative provider. You consider the costs of switching provider but also have less tangible concerns about going with a lower cost service — even though some of the lower cost alternatives seem excellent. You have had personal experience of an assessment system breaking down in the past. You spend a lot of time worrying about the possible consequences of various decisions even though you know that some potential consequences are extremely unlikely. What should you do? And what should you stop doing?