This paper deals with the applicability of CSP in general and SystemCSP, as a notation and design methodology based on CSP, in particular in the application area of real-time systems. The paper extends SystemCSP by introducing time-related operators as a way to specify time properties. Since SystemCSP aims to be used in practice of real-time systems development, achieving real-time in practice is also addressed. The mismatch between the classical scheduling theories and CSP paradigm is explored. Some practical ways to deal with this mismatch are presented.