Actors do not represent the physical people or systems, but their role. This means that when a person interacts with the system in different ways (assuming different roles) he will be represented by several actors. For example a person that gives customer support by the telephone and takes orders from the customer into the system would be represented by an actor Support Staff and an actor Sales Representative
Os actores non representan a xente ou sistemas físicos, senón o seu papel. Isto significa que cando unha persoa interactúa co sistema de diferentes xeitos (asumindo diferentes papeis) estará representada por varios actores. Por exemplo unha persoa que dá servizo técnico aos clientes por teléfone e recive pedidos dos clientes, no sistema estaría representado por un actor Servizo Técnico e un actor Comercial