According to examples, an apparatus may include a processor that may identify activities of an entity on resources over a predetermined period of time, in which the entity is to use permissions assigned to the entity over the resources to perform the identified activities. The processor may also identify which of a plurality of groups of permissions includes the permissions the entity used to perform the identified activities and may determine permutations of the identified plurality of groups of permissions. The processor may further calculate respective scores for each of the determined permutations to identify permutations of the groups of permissions having the lowest scores and may output information pertaining to the determined permutations having the lowest scores.