The telecommunications service provider (TSP) strategy for collaborating with the industry that utilizes the Internet of Things (IoT) is an excellent opportunity to overcome digital disruption. TSP serves only human-type customers, thus constructing new business processes for the IoT, a non-human customer base, is a challenge to be addressed. Some large companies that are transforming business processes face difficulties in using the strategic framework for reasons such as ineffective management of organizational change, internal resistance, technical issues, and conflicts between frameworks and business needs. The enterprise architecture (EA) is a comprehensive strategic framework that involves company analysis, design, and solution implementation. This study examines transformation project implementation based on the EA model as a prototype, from business strategy to practice, using the concept of three intersections among project management, strategic management, and business processes. Thus, the aims of this study are to develop a method for implementing a telecommunications cross-industry collaboration project with an IoT-based company, and heuristic implementation of the method as a research initiative in producing an EA model as a project prototype. The development of the proposed methodology requires the dynamic systems development method (DSDM) as the agile foundation, including pre-project, feasibility, business study, functional model, design and build, and implement. The implementation phase proposes a transformation strategy that addresses company elements: 22 at business layer, 6 at application layer, 4 at technology layer, and 15 relationships, to be executed by the company in order to increase the company's competitive value.