We have a formal process for evaluating. It's done on an annual basis. It's cyclical.
As in any other organization, there are managers who, on a daily basis, are keeping an eye on the people who report to them. That's done informally. If there's a problem with a particular member, the member's manager is cognizant of that. The member's manager is involved in things such as designing what specific training is required, and the member's manager, on a daily basis, is watching how they're doing. It's written up at the end of the year in a formal evaluation.