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This paper describes our management of the systems modernization effort at the United States Capitol Police (USCP). The Enterprise Architecture of the United States Capitol Police comprises six broad categories of business applications. Of these six, two represent clusters of IT applications: the administrative information systems (AIS) and the operational law enforcement information systems (LEIS). The Enterprise System Architecture is comprised mainly of these two systems. A number of guiding principles are used to manage these systems modernization activities. One of those guiding principles is to use commercial off the shelf (COTS) products as much as possible to reduce development time and implementation costs. In some cases, we were able to successfully implement COTS products with little or no modifications. However, in others, the COTS products needed extensive modifications due to new, unique or evolving business needs. This paper will discuss the management strategy used to select, consolidate, modify, test and implement systems within the framework of USCP's enterprise architecture. This paper also discusses lessons learned from our system upgrade, conversion, consolidation, migration, integration and modernization experiences. Introduction. The Office of Information Systems (OIS) at the United States Capitol Police(USCP) supports various systems including administrative and law enforcement information systems. The USCP operational environment (Figure 1) is grouped into six different systems based on their functionality: Physical Security, Communications, Wireless Communications, Command and Control, Administrative and Law Enforcement clusters. This paper covers only the Administrative Information Systems (AIS) cluster and Law Enforcement Information Systems (LEIS) cluster. It focuses on the initial phase in the information systems modernization process undertaken by the USCP's Business Systems Modernization Office (BSMO). This paper will also discuss project management processes being used at the United States Capitol Police to: manage evolving (changing) user requirements; analyze, design, develop and implement an enterprise system architecture; select, modify and integrate Commercial Off the Shelf (COTS)

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