This activity represents the first activity of the "Preliminary requirements" process which extends from Activity #1 to Activity #5.
This first activity concerns the description of the system and of the environment in which the system will be deployed. It consists in defining what to build or what is the most appropriate system for end-users.
End-users, clients, analysts and designers have to list the potential requirements. The context in which the system will be deployed must be understood. The functional and non-functional requirements must be established. This information must be written in the Requirements Set document. You can use a basic text editor or your preferred one.
To write this document and describe these requirements, you can adopt the generally accepted plan described in the file provided in a rtf or a pdf format.