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Enterprise Architecture 

Starting in 2000 the Department of Technology Services initiated an Enterprise Architecture program that resulted in the official publishing of the Montgomery County Technical Architecture document in 2003. The architecture has been updated on a roughly yearly basis since that time.

The County’s Enterprise Architecture effort is based around maintaining an Enterprise Architecture that defines the following:

Each component architecture is interelated and supportive of the others. The sum total of all the subcomponent architectures make up the County Enterprise Architecture Standard. The relationships among the component architectures is illustrated in the following diagram:

flow chart of DTS enterprise architecture

The County has one Enterprise Architecture that is released as a rollup Architecture Document and the 5 subcomponent architectures. At this point the Business, Technical and Performance subcomponent Architectures are available.

Rollup Enterprise Architecture Document

Subcomponent Architecture Documents

The latest official release of the Technical Architecture document is dated March 16, 2011.

The latest official release of both the Business and Performance Architecture documents is dated March 16, 2011.

The purpose of the Enterprise Architecture is to communicate:

In general, it communicates how the organization has invested in its IT infrastructure (including hardware, software, processes and people). The County continues to make significant investments in IT and must communicate to many parties how future investments align or impact the architecture and infrastructure.

Strategic Standards

The Enterprise Architecture presents well-defined, strategic standards adopted for the development and delivery of the County’s information systems. It provides a cohesive blueprint to optimally design, purchase, develop, deploy and manage information systems for the County. The components of the overall infrastructure are shown in the next figure:

Information technology framework


The Framework may be defined as a collection of the follow­ing interrelated component architectures or domains:

The customer oriented domains are offered as shared Enterprise Services to County Departments, Groups, and Agencies and are documented internally on the Department of Technology Services Intranet Home Page.

Enterprise Architecture Slices

The DTS Enterprise Architect creates domain specific enterprise architecture slices as project and business need arise.  Each slice covers a specific domain and is meant to fullfill either a project or program need.  The slice is meant to do a deeper dive into a specific domain while inheriting all the properties of the County Enterprise Architecture.  The slice is maintained as the need continues and as the domain users remain engaged and supportive.  

Policies and Procedures

Enterprise Architecture Domain Metrics (Production Only) (Updated 4/19/2013)

Please email the Department of Technology Services Enterprise Architect (Mike Tarquinio at for any questions or comments.


Contact Us: Director's Office · Montgomery County Department of Technology Services
Executive Office Building · 101 Monroe St. · 13th Floor ·Rockville, Maryland 20850
Telephone: 240-777-2900 · Fax: 240-777-2831