# Predictive Science Academic Alliance Program **Domain:** Austin Research / Programs **Doc Type:** Research entity **Source basis:** Supplied research cluster with linked references; see the [[wiki/Austin Research Evidence Map|evidence map]] for verification scope. The **Predictive Science Academic Alliance Program (PSAAP)** is [[wiki/National Nuclear Security Administration|NNSA]]’s university research program for predictive simulation, computational methods, and the scientific workforce supporting its national-security mission. Oversight sits within the [[wiki/Advanced Simulation and Computing|Advanced Simulation and Computing]] program. Austin’s [[wiki/PECOS|PECOS]] is a major historical case. ## Why the nuclear lineage matters [[wiki/Nuclear Stockpile Stewardship|Stockpile stewardship]] requires consequential judgments about systems whose full behavior cannot routinely be tested through nuclear explosions. That pressure makes numerical verification, physical validation, and uncertainty quantification integral to prediction. A model must supply grounds for confidence appropriate to the intended decision, including the consequences of uncertain inputs and incomplete observations. ## Generations - **2008 — PSAAP I:** emphasis on [[wiki/Verification Validation and Uncertainty Quantification|verification, validation, and uncertainty quantification]]; UT’s original PECOS award was approximately $17 million. - **2014 — PSAAP II:** additional emphasis on extreme-scale computation. - **2020 — PSAAP III:** continued exascale development; UT announced a $16.5 million, five-year PECOS award involving plasma-torch simulation and experiments. - **2025 — PSAAP IV:** the program added stronger AI/ML and data-science emphases. Its program-wide evolution should be distinguished from the separately documented UT awards. ## Cross-domain significance The master article uses this lineage to explain why Oden’s engineering culture treats trust in prediction as a technical problem. Those methods can travel into medicine, outbreak forecasting, autonomous control, and [[wiki/Digital Twin|digital twins]]. Each application still requires validation for its own physical processes and operating conditions. ## Connected entries [[wiki/National Nuclear Security Administration|National Nuclear Security Administration]] · [[wiki/Advanced Simulation and Computing|Advanced Simulation and Computing]] · [[wiki/PECOS|PECOS]] · [[wiki/Oden Institute|Oden Institute]] · [[wiki/Verification Validation and Uncertainty Quantification|Verification Validation and Uncertainty Quantification]] · [[wiki/Predictive Science|Predictive Science]] · [[wiki/Nuclear Stockpile Stewardship|Nuclear Stockpile Stewardship]] · [[wiki/Austin Executable Loop|Austin Executable Loop]] · [[wiki/Lawrence Livermore National Laboratory|Lawrence Livermore National Laboratory]] · [[wiki/Robert Moser|Robert Moser]] · [[wiki/Sandia National Laboratories|Sandia National Laboratories]] ## Sources and corpus context - [[research/The Austin Executable Loop|The Austin Executable Loop — master document]] - [NNSA Announces Selection of the Next Round of Predictive Science Academic Alliance Program Centers](https://www.energy.gov/nnsa/articles/nnsa-announces-selection-next-round-predictive-science-academic-alliance-program) - [DOE Timeline of Events: 2008 — PSAAP and PECOS](https://www.energy.gov/lm/timeline-events-2008) - [UT Austin Wins $17 Million Grant from Department of Energy for Computational Research](https://news.utexas.edu/2008/03/07/the-university-of-texas-at-austin-wins-17-million-grant-from-department-of-energy-for-computational-research/) - [Predictive Science Research Gets Major Boost Thanks to the Department of Energy](https://news.utexas.edu/2020/10/05/predictive-science-research-gets-major-boost-thanks-to-the-department-of-energy/) **Cluster:** [[wiki/Austin Executable Loop|Austin Executable Loop]] · [[wiki/Austin Research Evidence Map|Austin Research Evidence Map]]