Architecture Levels and Decision Scope
Architecture spans the enterprise down to one system. See how scope and domain differ, why logical, physical, and operational views diverge, and who decides.
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Solution Architecture
Solution architecture focuses on delivering a particular business capability. It may concern one system or changes across several, with explicit constraints and ownership.
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Enterprise Architecture
Enterprise architecture links organizational strategy to architectural decisions at several scopes, setting principles and standards that lower-level designs can trace to outcomes.