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Quick Reference: Differences between LSA and SPM Reporting Logic


Date Published: October 2018


Both the Longitudinal Systems Analysis (LSA) and the System Performance Measures (SPM) provide Continuums of Care (CoCs) with a look at their overall system functioning. The SPM report is a summary and year-to-year comparison of system wide counts, averages, and medians related to seven areas of performance. The LSA upload also includes data related to several of the same areas of performance, but the business logic defined by HUD for the two reports differs substantially. This brief document describes the differences.

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Tags: CoC HDX
Author Organization
  • HUD
Resource Approver
  • HUD Approved