n The Facilitator’s Guide to Participatory Decision-Making, Sam Kaner et all introduce the Community At Work's Gradients Of Agreement Scale. The scale addresses the problems of getting everyone's agreement on an issue. Instead of asking everyone for a simple Yes or No to a proposal, which can force people to take positions that do not fully reflect their position, you instead poll everyone's agreement to it along a predetermined scale. The Community At Work Gradients Of Agreement Scale looks like this:

Endorsement - "I like it."
Endorsement with a Minor Point of Contention - "Basically I like it."
Agreement with reservations - "I can live with it."
Abstain - "I have no opinion."
Stand Aside - "I don't like this, but I don't want to hold up the group."
Formal Disagreement, but Willing to Go with Majority - "I want my disagreement noted in writing, but I'll support the decision."
Formal Disagreement, With Request to be Absolved of Responsibility for Implementation - "I don't want to stop anyone else, but I don't want to be involved in implementing it."
Block - "I veto this proposal."