Chaplain Marilyn Morris has managed volunteers who work in a number of hospitals in Ohio for the last 10 plus years. While obviously volunteers in hospitals do not deal with the same issues as those at the UN, many of the elements of the selection, training, orientation, care and maintenance of volunteers is similar.
I think you will find this piece very useful to those who are tasked with the responsibility for a team of volunteers. It can be seeming small points that result in the largest leverage and greatest saving of time. Listen carefully when you get to the part about the interview concerning recruiting and interviewing potential volunteers. It’s about 10 minutes in.