**2.2 Policy based resource allocation**

For resource allocation in Grids, some researchers have also proposed policy based resource allocation techniques. Sander et al. [12] propose a policy based architecture for QoS configuration for systems that comprise different administrative domains in a Grid. They focus on making decisions when users attempt to make reservations for network bandwidth across several administrative network domains that are controlled by a bandwidth broker. The bandwidth broker acts as an allocator and establishes an end-to-end signalling process that chooses the most efficient path based on the available bandwidth. The work presented in [13] is concerned with data transmission costs only; whereas the research presented in this research needs to consider both computation and communication costs associated with the PBDT tasks. Verma. et al. [19] has also proposed a technique in which resource allocation is performed based on a predefined policy. But in this research, the resource allocation is not based on any performance measure.
