LegiStorm

Summary:

Understanding the risks present at the U.S. borders and developing methods to measure border security are key challenges for the Department of Homeland Security (DHS) and the U.S. Border Patrol, the agency within DHS charged with securing the border between ports of entry. Metrics for border security are used at both the strategic level, by DHS, and at the operational level by Customs and Border Protection (Border Patrol). This report reviews DHS's and the Border Patrol's use of metrics in evaluating their objective to secure the border between ports of entry. DHS and the Border Patrol can use metrics to measure their performance and estimate risks at the border. Additionally, metrics provide Congress with an understanding of DHS's and Border Patrol's progress in securing the border. At a strategic level, DHS uses performance metrics to understand its ability to meet border security objectives. However, DHS has struggled to create a comprehensive measure of border security. Most recently, DHS has labored to create a new generation of performance metrics, through the estimation of unauthorized entry of migrants into the United States. This measure represents the volume of migration entering the United States and can be influenced by factors outside of DHS's control, and therefore may not directly speak on border security. Congress may want to consider whether this is an adequate performance metric for border security and whether additional and/or more comprehensive and targeted metrics are required. DHS's Annual Performance Report for FY2014-FY2016 reported two other performance metrics used to measure its progress in securing the border. First, the percentage of people apprehended multiple times along the Southwest border, or the recidivism rate, is used to capture the ability of the Border Patrol to deter migrants from re-entering the United States. Second, the rate of interdiction effectiveness along the Southwest border between ports of entry, or the effectiveness rate, measures the Border Patrol's ability to apprehend unauthorized migrants. In the past, DHS has used several different performance metrics. For example, from 2001 to 2004, DHS, and the former Immigration and Naturalization Service (INS), used optimum deterrence as a measure for border security, defining it as the level where applying more border security would not significantly increase apprehensions or deterrence. In 2005, DHS began to use operational control as a new measure, describing it as the miles along the border where the Border Patrol had the ability to detect, identify, respond to, and interdict cross-border unauthorized activity. When operational control was retired as a metric, migrant apprehensions became the interim measure for border security from 2011 to 2013. At an operational level, the Border Patrol uses metrics within its risk assessments. The estimation of risk at the sector level assists the Border Patrol in making day-to-day decisions with regard to how to best align its resources against different threats. The agency determines risk through its "State of the Border Risk Methodology." A secured border is characterized as low risk. The Border Patrol's methodology estimates the magnitude of risk by gathering and understanding intelligence information, developing a detailed awareness of threats at the border, and applying a standardized measurement of risk. These assessments are not used as metrics themselves. However, the Border Patrol's methodology monitors certain metrics at the sector level, such as the recidivist rate and effectiveness rate, which may be able to speak to the Border Patrol's performance. Metrics can provide an understanding of the state of the border. In reviewing border security metrics, Congress may be interested in issues surrounding the oversight of DHS's measurement practices, the determination of acceptable levels of risk for each metric, and the implementation of strategic and operational metrics and how they relate to one another. Moreover, Congress may consider how metrics can be used to inform decisions on expenditures and whether additional data and methodologies are needed to provide a more holistic view of border issues. Lastly, with migrant demographics shifting and some transit countries conducting their own enforcement of unauthorized migration, Congress may consider how these practices affect data and outcomes and what can be done to account for these changes.