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This new feature lets you configure your Profile Rank block so as to prevent certain options from appearing together in the same profile. For example, imagine you're running a conjoint survey about houseplants where your categories (attributes) include plant type, pot style, and pot location.
Some plants are not suitable for hanging or wall-mounted plant pots, such as the large monstera varieties. In this case, it would be ideal to be able to prevent these from appearing together -- that's where Prohibited Pairing comes in...
Prohibited Pairing revolves around "tiers" that you create and configure yourself. In this case, I have created three tiers, one for each of my Pot Location options: Hanging, Wall Mounted, and Floor. In the example above, you can see that the "Hanging" tier will only allow Woven Baskets, as that is a [hypothetical] limitation in the pot designs I can manufacture.
When OpinionX is selecting profiles to present to participants in a voting set, each profile will be get one of these tiers. The same tier can appear in more than one profile per voting set. Customers on the Ask tier or higher can add Prohibited Pairing to their survey through the Profile Rank block settings menu: