Definition
The SyRS presents the results of the definition of need, the operational concept, and the system analysis
tasks. As such, it is a description of what the system’s customers expect it to do for them, the system’s
expected environment, the system’s usage profile, its performance parameters, and its expected quality and
effectiveness. Thus it presents the conclusions of the SyRS development process described in Clause 5.
This guide suggests a distinction between this structured collection of information and the way in which it is
presented to its various audiences. The presentation of the SyRS should take a form that is appropriate for its
intended use. This can be a paper document, models, prototypes, other non-paper document representations,
or any combination. All of these representations can be derived from this one SyRS to meet the needs of a
specific audience. However, care should be taken to ensure that each of these presentations is traceable to a
common source of system requirements information. The audience should be made aware that this struc-
tured collection of information remains the one definitive source for resolving ambiguities in the particular
presentation chosen.