A virtual enterprise(VE)is a temporary alliance of enterprises that come together to share or core competence and resources in order to better respond to business opportunities.In order to offer their own services and to utilize the services of others in VE

it naturally demands the information sharing and interactions across organizational boundaries of enterprises. This paper presents a comprehensive methodology for building the distributed enterprises system that guarantees effectivity of coordinating and cooperating in the alliance of enterprise (i.e.virtual enterprise).It introduces the main concepts underlying virtual enterprise and virtual enterprise model(VEM). Then

it goes into details about the problem of defining a suitable VEM to effectively coordination activities in the enterprises network(ECN).