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A three-tier data warehouse architecture provides a structured framework for collecting, integrating, storing, and analyzing healthcare data. It enables hospitals and healthcare organizations to transform large volumes of operational data into meaningful information for clinical, administrative, and strategic decision-making. The architecture consists of the bottom tier, middle tier, and top tier, each performing specific functions. The bottom tier includes data sources, the staging area, ETL processes, metadata repository, and the data warehouse. Data sources are the origin of information collected from various healthcare systems. These sources include Electronic Health Records (EHRs), Hospital _________ ____ ________ _____ ______ _______ __________ _____.
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