[1]Models and Systems Engineering Team, Mobile and Embedded Information Systems Laboratory, National Higher School ofComputer Science and Systems Analysis, Mohammed-V University, PB 713, Rabat, Morocco;
[2]Models and Systems Engineering Team, Mobile and Embedded Information Systems Laboratory, Sof.tware EngineeringDepartment, National High School of Computer Science and Systems Analysis, Mohammed- V University, PB 713, Rabat, Morocco;