[TheThinkTank] Policy or Process for Removing Collective Members

Hi Everyone, I am wondering if anyone has a specific policy or process for removing individuals from the collective, or council however you define it, the inner group of people with voting power. We are restructuring our organization and do not have a system for this. In the process of trying to build capacity, we've had some problems with people not pulling their weight, but also have no process for removing them, while the rest of the collective doesn't particularly want to rock the boat with long-standing volunteers, so as a whole there are a lot of excuses for people so most likely a simple majority vote won't work. Any advice?

Thanks