EDI is the most widely deployed extranet system for inter-firm information exchange. LaLonde and Cooper (1989) have addressed EDI as one of the most important changes to affect SCM, and ‘it is the glue that binds long-term relationship, and plays an important coordinating role in managing the interfaces between firms as business process go beyond the boundaries of the firm’ (Mentzer, 2001). The main benefits of using EDI are: upstream SC partners can access timely and accurate information from markets and customers, and incorporate this into planning and scheduling; downstream SC partners can provide better customer services, responding to market changes and customer demands; all SC partners can reduce paperwork and enjoy quality communication. Other benefits derived from deployment of EDI are increased productivity, cost saving, accurate billing, and improved tracking and expenditure.