text: **3.2 User and group administration**
  
  When you design a Content Manager OnDemand system, you must determine the best way 
  to implement the many authority structures that are available for users and administrators of 
  your system. The span of control for the administration of the system must be considered with 
  the level of user access to the data that is stored in the system. How many different 
  administrators are required? Will all administrators have system administrator authority or will 
  different administrators have different levels of authority? What is the most effective way to 
  restrict a user’s access to only the data that is necessary to do that user’s job? 
  
  The answers to these questions depend on the size of the system, the degree of 
  centralization to be exercised over system administration, and the nature of the data and the 
  business needs of the users. 
  
  **Centralized or decentralized**
  In a system design that exercises centralized control, one or a few administrators are granted 
  system administrator authority. A centralized system typically is used when the number of 
  reports and users to be added to the system is small. Centralized administration is also 
  appropriate where resources are limited and only one person might have the skills and 
  knowledge to perform the system administration tasks, or where one user group performs all 
  of the administration tasks. 