The Enterprise Architecture Framework (EAF) alignment guidelines viewpoint serves as an integral part of the process, aiming to establish a harmonious relationship between the European Interoperability Reference Architecture (EIRA) model and any given Enterprise Architecture Framework (EAF). The ultimate goal is to make the EIRA model fully compliant with the chosen EAF, promoting uniformity across the architectural ecosystem. In this alignment diagram, each Architectural Building Block (ABB) carries a specific connection to the EIRA's Legal, Organisational, Semantic, and Technical (LOST) views that it belongs to. Each ABB forms a critical component of the architecture, representing distinct facets of the EIRA in the broader context of the selected EAF. This viewpoint connects different layers of the enterprise architecture, creating a comprehensive picture of the interoperability landscape. The intricate ties between each ABB and their corresponding LOST views can be thoroughly explored on the [Properties] sheet under the [Analysis] tab of Archi, a visual modelling and management tool for enterprise architecture. Here, users can investigate each ABB, understanding its role, its relationship with the LOST views, and its part in securing compliance with the EAF. The EAF alignment guidelines viewpoint allows organizations to align with industry standards, facilitates interoperability, and bridges the EIRA model with the selected EAF. It assists an organization in effectively detailing their enterprise architecture in line with their specific needs while maintaining alignment with larger industry frameworks. The viewpoint provides a structured layout, enhancing strategic decision-making, facilitating effective communication, and aiding the integration of different architectural elements. This organized alignment fortifies the architecture's robustness and provides a pathway for strategic expansion and evolution.