  In this work the use of the Rational Unified Process (RUP) to model the
design of a Detector Control System (DCS) in a High-Energy Physics (HEP)
experiment is proposed. We include a brief description of the wide diversity of
elements and aspects to be considered and general definitions for the analysis
of requirements. The characteristics, functional and non-functional
requirements and Use Cases (UC) of main actors involved in the design,
implementation and operation of this type of software systems are also
specified. For the description of these requirements, tools of the Unified
Modeling Language (UML) like diagrams and tabular use cases are used by means
of the Enterprise Architect software.
