International Journal of Information Studies Meriem Zaiter, Salima Hacini, Zizette Boufaida 4 1 2012 http://www.istudies.net/journal/sites/default/files/Towards%20a%20Functional%20Control%20of%20a%20Context-Aware%20Systems.pdf Distributed systems, can have a large number of independent hardware components that cooperate and collaborate to achieve a given objective. However, the assurance of the reliability is not evident because each of these components may cease to operate at any time, which result probably error and a failure of the whole system. The goal of this paper is to propose a way to control the continuous operating of a distributed system via a contextaware mechanism.