The assembly industry implements production outsourcing to meet the needs of assembly product components. The outsourcing of assembly product components is based on a relationship model between the contractor and the industry, between the industry with assembly parts and other processes, and more recently between the assembly parts and sales. In production outsourcing, there are generally no communication patterns established between the contractor/supplier and the assembly team regarding problems that may appear during the assembly process. Electronic data interchange (EDI) technology as a method to promote electronic communication between companies can be implemented for assembly teams and suppliers so that the former can relay component assembly problems during the assembly process. In order to improve coordination and communication with external business partners, the production outsourcing activities need EDI technology so they can communicate rapidly and accurately. To make EDI technology more useful, this method can be integrated with a manufacturing, planning system called computer-aided process planning (CAPP). CAPP is a link between design and manufacturing in a computer-integrated manufacturing environment. Commonly used by manufacturing engineers, CAPP can be used to develop a product manufacturing plan. The purpose of the present study was to design and develop a web-based software application integration initiative between EDI and CAPP that can be used as a communication means between the assembly team and the supplier, which will specifically help the assembly team to plan component assembly process so they can eliminate or reduce manual intervention in assembly planning