Department of Homeland Security 'United States Citizenship and Immigration Services' Budget Overview: Fiscal Year 2021, Congressional Justification [open pdf - 2MB]
From the Component Overview: "The strategic context presents the performance budget by tying together programs, or PPAs [programs, projects and activities], and performance measures that gauge the delivery of results to our stakeholders. The Common Appropriation Structure (CAS) allows DHS to integrate the programmatic view and a significant portion of the Level 1 PPAs represent what DHS refers to as our mission programs. A mission program is a group of activities acting together to accomplish a specific high-level outcome external to DHS and includes operational processes, skills, technology, human capital, and other resources. USCIS's [U.S. Citizenship and Immigration Services] mission programs are presented below. Performance measures associated with these programs are presented in two measure sets, strategic and management measures."
U.S. Department of Homeland Security: https://www.dhs.gov/