This paper presents the architecture and the algorithms used in DIET (Distributed Interactive Engineering Toolbox), a hierarchical set of components to build Network Enabled Server applications in a Grid environment. This environment is built on top of different tools which are able to locate an appropriate server depending on the client’s request, the data location (which can be anywhere on the system, because of previous computations) and the dynamic performance characteristics of the system. Some experiments are reported at the end of this paper, that exhibit the low cost of adding branches in the hierarchical tree of components and the performance increase induced.