Duration
Depending on the number of options and of participants,
2 - 10 minutes (but if embedded in arguing and giving reasons, it can take much longer.)
Materials
The Facilitator should not be afraid of arithmetic or get support for counting.
Origin of Tool
Erich Visotschnig / Siegfried Schrotta
Website
For more information :
https://openpracticelibrary.com/practice/systemic-consensing/