The chances of making a placement drastically increase when you send a candidate to multiple interviews.
Looking at raw data, getting a candidate 2 interviews rather than 1 will treble your chances of making a placement.
Getting a candidate 3 or more interviews rather than 2 will double again the chances of making a placement. This means if you get a candidate 3 interviews rather than 1 interview you are over 6 times more likely to do a deal.
There are 3 main reasons that the chances of a placement so drastically improve when they get multiple interviews.