For rank order analysis, rank 1 has a index value or weight of 1, rank 2 has an index value or weight as 2 and so on... For average rank order analysis, these values are used for rank calculation or mean. With weighted rank order analysis, you can customize the weight for each rank value.
Go to: Login » Select Survey » Analytics
On the dashboard, for your rank order question, click on the settings icon.This feature is available with the following licenses :