Maybe 
But here’s how you can use other methods of decision-making without breaking with the values of consent: propose to make a decision by another method of decision-making and get consent on the proposal.
Examples:
I don’t think we’ll be able to find consent on this question of favorite colors so I propose that we make this decision by majority vote. Is there consent on that process?
Or: we’re running out of time on this issue and it seems like people are pretty comfortable with how Martha is approaching this. I propose that Martha decides alone and lets us know.