Best practice in quality assurance ensures that reviewers are at arm’s length from the program under review. This means that reviewers/consultants are not close friends, current or recent collaborators, former supervisor, advisor or colleague.
Arm’s length does not mean that the reviewer must never have met or even heard of a single member of the program. It does mean that reviewers should not be chosen who are likely, or perceived to be likely, to be predisposed, positively or negatively, about the program. It may be helpful to provide some examples of what does and does not constitute a close connection that would violate the arm’s length requirement.
Additional advice for choosing external reviewers
External reviewers/consultants should have a strong track record as academic scholars and ideally should also have had academic administrative experience in such roles as undergraduate or graduate program coordinators, department chair, dean, graduate dean or associated positions. This combination of experience allows a reviewer to provide the most valuable feedback on program proposals and reviews.
For additional tips for choosing external reviewer’s, read this article from The Chronicle of Higher Education.
Source: Quality Assurance Framework.