1. A system comprising: a collector system comprising a collector system database, the collector system connected to a plurality of enterprise resource planning systems through a communications network, each enterprise resource planning system comprising a module performing a different business function from other module(s) in the same system; the collector system operative to: acquire from each enterprise resource planning system over the communications network a list of modules included in each enterprise resource planning system and a status of each module in the list; for those modules identified as active, acquire from the respective enterprise resource planning system through the communications network a list of entities authorized to access the active modules; record the entities authorized to access each active module in the collector system database; link the entities recorded in the collector system database to corresponding entities included in a hierarchical organizational chart; and record each module that is not used by the entity in a usage switch database of an access control system, the usage switch database being used by the access control system to prevent the entity from connecting to the module(s) that are not used by the entity.