expand_less Anyone with a user account can edit (and add to) Wikirate. You can edit values if you have added incorrect data or found a better answer. 
In some cases, Metrics are ‘Designer Assessed’ which means that for that metric, values can only be added or edited by the person or organization that created that Metric. In those cases, anyone can still leave Comments to let the Metric Designer and wider Community know if they found contradictory or supplementary evidence. 
To learn more about how you can edit data on Wikirate, see ….