In this thesis, a fuzzy goal programing (FGP) approach has been used for solving concave multi-level multi-objective quadratic programming problem (ML-MOQPP) when a constraint is a rough set. To avoid the complexity of the ...

In this thesis an in nite capacity single server Markovian queuing system with mul- tiple working vacations, changeover time and reneging was analyzed. It was assumed that customers become impatient only during working ...