Recruitment and Selection: Factors affecting Outsourcing Decisions

Where have you seen or read about the term 'impartiality' under this topic? Which topic: outsourcing or recruitment?

Its is the BPP text,In chapter 12 Recruitment and Selection.Pg 322 under the topic head recruitment consultants.(2.4)

I don't have that text. I assume it means that external consultants are independent and won't show favouritism to any particular candidate - even one who is a relative of a current employee.