There are Consultants, Power users, End users in a SAP R/3 system. The users are differentiated by the level of authorization End users– Normaly are given authorisation to only specific transactions (T.codes)– like creation of Sale order, Delivery, transfer order etc etc.. For eg a person in the ware house would only be given authorization to create, Transfer orders and not to create Sale orders. Similarly a sales person will have the authorization to create SOs and not TOs. Power Users– People who have additional authorizations to change or add data to make the system adapt to day to day business requirements are power users. Master record creation, Condition record creation. These people sometimes are also allowed to view the customization screens and normally not allowed to make any changes in the customization. Consultants– These people (We) mainly work in customization. their authorization level depends on the Server they work on. For eg: In development server to all screens In testing server except few critical customization screen to all screens In production server – To get any screen in production to end user, here user role can be changed by the help of basis to work in production server in case of emergency like they would like to find the root cause of the error which happens only in production server and not in any other server.