# Predictive Science Academic Alliance Program **Entity class:** Program or project **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]] ## Relationships <!-- BEGIN HUMANIZED RELATIONSHIPS 2026-09-11 --> This entry's documented connections are expressed in its definition and related-work routes, with provenance retained in the source-linked material. <!-- END HUMANIZED RELATIONSHIPS 2026-09-11 --> ## Austin defense-technology role NNSA program supports university centers developing physically grounded predictive simulation. The article identifies PECOS as UT's selected center and connects the program with verification, validation, and uncertainty. Nuclear-stockpile requirements supplied a consequential setting for predictive computation. Verification addresses the implementation, validation compares the model with physical evidence, and uncertainty analysis qualifies the decision. The university research lineage connects national laboratories, UT methods, TACC computation, and experiments without treating a successful method in one domain as automatic validation in another. ### Regional relationships - **UT center:** [[wiki/PECOS|PECOS]]. - **core methodology:** [[wiki/Verification Validation and Uncertainty Quantification|Verification Validation and Uncertainty Quantification]]. - **regional master router:** [[wiki/Austin Defense Technology|Austin Defense Technology]]. - **source article:** [[articles/How Austin Became a Different Kind of Defense Tech Epicenter|How Austin Became a Different Kind of Defense Tech Epicenter]]. - **civilian supplier and participation economy:** [[collections/The Civilian Intelligence Marketplace|The Civilian Intelligence Marketplace]]. - **intelligence architecture:** [[collections/Terrorism, Counterterrorism, and the Intelligence Environment|Terrorism, Counterterrorism, and the Intelligence Environment]]. ### Austin sources - [[articles/How Austin Became a Different Kind of Defense Tech Epicenter#The Executable Loop|Austin defense-tech article — The Executable Loop]] — October 2026 revision; source for this entry’s regional role. - [U.S. Department of Energy, Timeline of Events: 2008](https://www.energy.gov/lm/timeline-events-2008) - [UT News, 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/) ## Connected Austin capabilities [[wiki/National Nuclear Security Administration|National Nuclear Security Administration]], [[wiki/PECOS|PECOS]]. These entries identify associated implementations, people, methods, and institutional contexts in [[articles/How Austin Became a Different Kind of Defense Tech Epicenter|How Austin Became a Different Kind of Defense Tech Epicenter]]. [[wiki/Austin Defense Technology|Austin Defense Technology]] supplies their regional arrangement; [[collections/The Civilian Intelligence Marketplace|The Civilian Intelligence Marketplace]] supplies the wider supplier and participation economy.