How to schedule PhD defense
Scheduling anything with committee members is a big pain. The way I scheduled my defense and comps was to just send a doodle poll (like you mentioned) and have them select all the dates. Two of my committee members were very nice and checked all the dates going through almost 4 weeks and two of them never responded or even clicked the link. I just used these dates to check the availability for a conference room in the dept. and sent a final set of 4/5 days to the ones who didn't respond. After sending that a few times and reminding one of them in person, I just scheduled it on a day that I thought was OK and went ahead with that. Everything worked out great and even the person who never responded didn't protest when I picked the time and date. Good luck o
n this. I will celebrate the fact that I never have to do this again :)