MACS Actors. The below diagram depicts the many different users of the coming MACS. Because the uses are described in more detail I the documents describing the different subsystems, most uses have been generalized into a generic MACS user. Figure 3.3.1 Overview of the main users of MACS identified. Pls. note the generalization of all users but system administrators and external users into the MACS generic user. This is due to the general nature of the below use cases. More detailed use cases can be found in the documents describing the individual subsystems handled by MACS (the building phase MACS is not included here (see WSMS report for details).