In this paper, we present a new extension and reinterpretation of one of the most successful models of awareness in computer supported cooperative work (CSCW), called the spatial model of interaction (SMI), which manage awareness of interaction through a set of key concepts, to manage task delivery in collaborative distributed systems. This model also applies some theoretical principles and theories of multi-agents systems to create a collaborative and cooperative environment that can be able to provide an autonomous, efficient and independent management of the amount of resources available in a grid environment. This model has been implemented using Web services and some experimental results carried out over a real and heterogeneous grid are presented with the end of emphasizing the performance speedup of the system using the AMBLE model