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VA Enterprise Architecture

VA EA Systems and Applications Domain

Systems and Applications Domain

VA operates the nation’s largest integrated health care system that includes more than 1,700 medical facilities and administers a wide variety of benefits in support of Service members, Veterans, their dependents, and survivors. VA has developed a wide range of information technology (systems, applications, and infrastructure) to enable the effective and efficient accomplishment of its mission.

Domain Scope

The Systems and Applications Domain describes the information technology environment and tools necessary to execute the Department’s business capabilities and functions. These tools operate to support the VA mission by storing, retrieving, transmitting, exchanging, and manipulating information essential to VA. According to the Conceptual Metamodel below, the scope of this Domain includes mission applications, interfaces, an enterprise service registry and authoritative data sources.

Conceptual Metamodel – Systems and Applications Domain View Conceptual Metamodel – Systems and Applications Domain View

Conceptual Metamodel – Systems and Applications Domain View


The Systems and Applications Domain is closely linked to the Business and Data and Information Domains through the business processes and functions, system-related performance measures, and enterprise data and databases that store and manage the data. This Domain is also linked to the Networks and Infrastructure and Security Domains through technical standards, supporting IT equipment, and the security standards with which the systems must comply to appropriately protect VA’s information assets. These linkages:

  • Enable effective and efficient portfolio management decisions
  • Enable complete and accurate descriptions of the security boundaries of VA IT solutions
  • Describe alignment of VA’s IT environment to the strategic direction of the Department
  • Enable improved interoperability within the Department and among VA and its external partners

When this meta-model and linkages are fully developed, the information captured in this Domain can be used to inform portfolio management, enable system divestiture planning, and ultimately improve overall IT investment decision making.

Compliance & Standards