The desc ties this to the assignmentOrder property of a UCS Pool object. AssignmentOrder determines the policy UCS Manager uses to pick which specific server in the pool gets handed out next — for example strict sequential order versus a default/unspecified selection — which matters when an admin needs predictable, repeatable server assignment across profile associations. Example: an assignmentOrder of 'sequential' means the pool always hands out its lowest-numbered available server first, rather than an arbitrary one.