A use case diagram for GAD-1's Department Module should provide an up-to-date system requirements specification (SRS). The diagram should accurately depict all the various processes and actors related to the module, as well as any necessary preconditions, postconditions, and alternate paths of behaviors. This will ensure that users have a comprehensive understanding of the module's purpose at a glance and plan accordingly. You can download this template from EdrawMax and customize it as required. EdrawMax has other similar templates that are 100 percent customizable.