I'm part of a trio. So far we assign the the mom to a doula initially based on which one seems a good fit. Sometimes we'll have just one at the initial interview or two. But typically we do much of the general info via email, so teh first in person meeting is often not as much "interview" as getting to know you. Then we assign a back up. The mom always has final say and we let her know. So far its worked well, and the moms have been happy. So they have their own doula. We back each other up, and help watch each others kids during a birth. We have our business (which is still new, but going well) set up that a specific amount comes off the top of every birth, or a percentage if your dong a reduced fee for someone, and goes right into the business account. WE all having matching binders that we track mileage, expenses etc, and our group calendar, which we have on a yahoo group, so we can keep up with each other even if we're not having a meeting. As of now, I handle most the promotions and emails for the group. Its just easier having one person do this! If a doula meets a mom and she comes to us, that doula keeps that mom. She got her in, she gets to keep her unless she thinks one of us would be better. Which we've had before. I just met a mom who I know would be perfect with my friend. We try to have a child free meeting once a month to discuss where we are currently, and our plans for the future and how we plan to achieve them.
Hope this helps some. We are also very networked with other local doulas, and take referral work as well.
mom to Reaghan born underwater into midwife's hands 1/17/07 & Myra born surrounded by doulas and midwife at home 1/12/09. Birth Educator, and Photographer, Baby #3 Coming May 2013!