Understanding work item queue management

In Business Process Server, workitems can be generated when a process instance is created, and these workitems are assigned to a valid human performer or valid user group as tasks. A work item queue is a dynamic data structure to which users and groups are added, allowing them to subscribe to workitems assigned to the queue. Work item queues are dynamic in the sense that, you can add, remove or update users and groups to a queue during run time.