The U.S. Air Force has historically relied on frequent permanent change of station moves for mission execution and personnel management, with direct impacts on career development. These moves drive significant costs and create disruption for service members, families, and units. The Air Force asked RAND to analyze policy options for extending assignment durations to optimize cost savings while maintaining readiness and retention.

Air Force Assignment Durations

Modeling Policy Changes and Their Effects on Cost, Readiness, and Retention

Kelly Atkinson, Lisa M. Harrington, Anna White Hewitt, R. Gordon Rinderknecht, Albert A. Robbert, Kelly Piazza, James Fan, Anthony Lawrence, Jessica Lu, Nathan Thompson, et al.

ResearchPublished Mar 31, 2026

Cover: Air Force Assignment Durations
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Includes Research Summary

In summer 2023, the U.S. Air Force announced a funding shortfall driven by higher-than-projected costs. This fiscal pressure, combined with a May 2025 U.S. Department of War tasking to reduce the frequency of permanent changes of station (PCSs), led the Air Force Personnel Center to task RAND with exploring options for extending assignment durations. The analysis revealed that reducing the frequency of PCS moves could achieve significant cost savings from the $1.3 billion annual PCS budget for executing operational, rotational, unit, and training moves: Extending certain overseas tours would generate $186 million in annual savings, and enforcing five-year tour lengths for many assignments in the continental United States would generate $240 million in annual savings. Implementation would require navigating complex trade-offs and substantial cultural changes.

The authors conducted a comprehensive analysis using multiple methods: reviewing current assignment policies; analyzing cost, readiness, and retention data from personnel records and exit surveys; developing new analytical tools, including a Microsoft Excel–based Simple Assignment Model using queuing theory; conducting stakeholder workshops and discussions with 25 subject-matter experts from Headquarters Air Force and the Air Force Personnel Center and from career field managers; and examining assignment practices in other military services.

Key Findings

The assignment system presents complex trade-offs among cost, readiness, and retention

  • Operational and rotational moves comprise 69 percent of total PCS costs despite representing only 41 percent of moves, which makes them prime targets for reduction.
  • Career mobility improves long-term retention, while assignment stability reduces separation probability at tour completion. The two mechanisms operate simultaneously.
  • Officers prefer having fewer moves for family stability; junior enlisted personnel desire more mobility for career development and to avoid job stagnancy.
  • Model excursions demonstrate that extending overseas tours and reducing uncontrolled tour frequency could achieve 8 to 22 percent cost savings.
  • Cultural expectations linking frequent moves to career advancement create resistance to change. Assignment teams operate with inconsistent practices and limited cost consciousness.

Recommendations

  • Implement broad policy extensions. Extend tour lengths outside the continental United States; establish longer baseline assignment durations with mission-specific exceptions. Conduct systematic reviews and pilots of extended assignment lengths in select career fields and locations, monitoring impacts.
  • Refine existing policies. Audit current policies to identify extension opportunities, set caps on the number of moves assignment teams are authorized to execute, and enforce existing time-on-station requirements more consistently. Revise developmental and rotation expectations to better align with operational realities and family considerations, reducing moves where feasible. Evaluate and modernize incentive pay programs.
  • Target specific populations. Customize assignment durations based on career field, family status, and individual preferences, with particular focus on extending tours for medical specialties and rated personnel.
  • Focus on stability. Expand local move opportunities, eliminate policies prioritizing longest time on station for moves, and leverage existing opportunities for career development in geographically clustered locations.
  • Use analytical tools. Deploy the Simple Assignment Model to evaluate policy changes and their impacts before implementation.
  • Address cultural and organizational barriers. Develop a robust communication strategy to explain the rationale and benefits of assignment extensions. Engage with key stakeholders in the policy design process to ensure buy-in and address concerns. Provide cost transparency to assignment teams and revise promotion requirements to value stability alongside mobility. Coordinate assignment reform with revisions to career management and promotion systems to maximize effectiveness and minimize unintended consequences.
  • Monitor and support implementation. Establish metrics to evaluate the impact that assignment extensions can have on readiness and mission effectiveness.

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Atkinson, Kelly, Lisa M. Harrington, Anna White Hewitt, R. Gordon Rinderknecht, Albert A. Robbert, Kelly Piazza, James Fan, Anthony Lawrence, Jessica Lu, Nathan Thompson, Sankalp Kumar, and Anton Wu, Air Force Assignment Durations: Modeling Policy Changes and Their Effects on Cost, Readiness, and Retention. Santa Monica, CA: RAND Corporation, 2026. https://www.rand.org/pubs/research_reports/RRA3735-1.html.
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This research was sponsored by the Air Force Personnel Center and conducted by the Workforce, Development, and Health Program within RAND Project AIR FORCE.

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