Affinity grouping can be used as a collaborative prioritization activity. It works by having your group of participants brainstorm ideas and opportunities on Post-It Notes. The team then works to put the sticky notes into groups of similar items. Once the groups are created, the team votes on the groups to rank them.
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Woffice comes with several built-in demos that you can install in one single click. You can test the available demos here and feel free to challenge any presented feature.