Huge changes in requirements, however, are frustrating for everyone. Not only do changes slow down the search, it slows down your business as well. Seek consensus on candidate specs before the recruiter starts hunting for you. Clarifying those sorts of distinctions will help the recruiter target their search more effectively. Establish a weekly conference call to review candidates.
Some companies dismiss unsuitable candidates with a short, blunt note.
It's more productive to spend time after the interview to do a little debriefing with the recruiter, making sure they understand your reasons for rejecting each applicant. Think of the recruiter as your personal chef, cooking up your perfect meal. It's easier to let them know about your aversion to onions in advance, then to find yourself picking the ingredient off your dinner plate. Try to work through a thorough search as quickly as possible. As searches progress, the best people get snapped up, or get more expensive.