This report delves into the realm of Enterprise Architecture, presenting an in-depth analysis of case studies, particularly focusing on Johnson & Johnson's challenges and potential solutions. It examines the application of the Zachman Framework to the case study, providing a structured approach to problem-solving. Furthermore, the report explores various Enterprise Architecture frameworks, including TOGAF, FEAF, and Gartner, comparing their strengths and weaknesses. It also investigates the relationship between Enterprise Architecture and Service-Oriented Architecture (SOA), highlighting the synergies and potential conflicts between the two. The report includes detailed Entity-Relationship Diagrams (ERDs) for a milk dairy system and a Quikfix electronics repair system, offering insights into database design. Finally, the report reviews journal articles on big data and cloud computing in the context of Enterprise Architecture, providing recommendations for their effective implementation.