In a typical business process, several people are performing tasks. These people are called Roles. A Role is a name given to a single person or to a group of users. Roles are defined according to the needs of the organization.
Most commonly, users are grouped according to the kind of work they perform. They can also be grouped according to their authority, responsibility, skill, or profession.
For example, a Manager Role might contain the first-line managers in an organization.
When you assign activities (Activity Nodes, Compound Activity Nodes, or Voting Activity Nodes) to Roles, you are recommended to assign group without assigning users directly. This will allow you to be flexible with change of organization If personnel changes occur, only the Role definition needs to be updated and not all the process definitions that use the Role
