This document establishes a set of process descriptions for the governance and management of a collection of architectures and the architecting of entities. This document establishes a set of process descriptions for the conceptualization, evaluation and elaboration of an architecture and the architecting of an entity. This document also establishes an enablement process description that provides support to these other architecture processes. These processes are associated with the architecture practice applicable to various entities such as enterprises, business components, capability areas, mission areas, missions, systems, systems of systems, families of systems, infrastructure, products, services, product lines, hardware, software applications and technologies. These processes are intended for: – participants in architecting and engineering efforts; – organizations and projects adopting architecture practice in their architecting and engineering efforts; – developers of architectures, architecture designs, solution designs, architecture descriptions, reference architectures, reference architecture descriptions and reference models; – stakeholders using architectures as the baseline for their activities; – providers of architecture-related standards, guidelines, training, education and evaluation instruments used for assessment of architecture practices and architecting work products; – developers of architecture description languages, architecture modelling languages, architecture frameworks, architecture development and modelling methodologies, and architecture-related tools and technologies. The application areas of this document include, but are not limited to, the following: artificial intelligence (AI), machine learning (ML), Internet of Things (IoT), cloud computing, big data, smart cities, smart manufacturing, cybersecurity, digital twin, telecommunications, aerospace, defense, banking, finance, insurance, energy, automotive, hospitality, healthcare, supply chain, transportation, manufacturing, agriculture, production, and infrastructure. This document addresses generic architecture-related terms and definitions and does not address domain-specific terms and definitions. This document does not address concepts and principles related to architecture competencies.