User versus Role Assignments 

MDM workflow steps can be assigned either to one or more users or to one or more roles, as follows:

·        Users. User-based assignments allow you to explicitly specify which user or users should be responsible for performing the step.

·        Roles. Role-based assignments allow you to specify roles rather than users, with the actual users determined by MDM at runtime.

Role-based assignments avoid having to explicitly identify users at design time, so that the actual users can change over time.