The application of engineering disciplines to the analysis, design and construction of structures or systems. Architectural engineering principally focuses on the engineering and durability qualities (the soundness) of the structure of an architected entity.
Architecture is the arrangement of functions and features within a system that strives for ideal harmony and balance of utility, durability and delight for the stakeholders.
113: "An Architecture Description [AD] is a work product used to express the Architecture of some System Of Interest. The Standard specifies requirements on ADs. An AD describes one possible Architecture for a System Of Interest. An AD may take the form of a document, a set of models, a model repository, or some other form (AD format is not defined by the Standard)."