The rating for an item in Portal for ArcGIS decrements by 1 when the item is rated either 5 or 4 stars.
Last Published: December 23, 2016Portal for ArcGIS
Bug ID Number
BUG-000098840
Submitted
August 24, 2016
Last Modified
February 14, 2023
Applies to
Portal for ArcGIS
Version found
10.4
Status
Will Not Be Addressed
The development team has considered the issue or request and concluded it will not be addressed. The issue's Additional Information section may contain further explanation.
Additional Information
Portal and Online both use a Bayesian averaging algorithm for ranking items where :
Bayesian Rating =
(Average Number of Votes across all item * Average Rating of all items) + (Total People Who Rated * Item’s Total Rating) / (Average Number of Votes across all items + Total People Who Rated)
When the user selects a rating of 5 stars this value is applied to the averaging algorithm which is why you see the rating change.