Computing Resources Overview
ASC Business Model
Terascale Simulation Facility
ASC Business Model
Verification and Validation
Based on the functional and operational requirements established by designers,
analysts and code developers for greater fidelity of codes and models, this subprogram
establishes a technically rigorous foundation for the credibility of code results.
This subprogram interfaces with the Integrated Codes Subprogram to obtain regular,
official code releases from the code projects. Verification activities assess
code precision in implementing numerical approximations and assess the accuracy
of these numerical approximations. Validation activities aid in the understanding
and assessment of a model's accuracy by comparing model predictions with
experimental data. Quantification methodologies provide measures of the uncertainties
associated with the simulations. Sound software quality engineering practices
are used to ensure robust, efficient, and well documented software releases of
the ASC codes.
- V&V Methods: methods, measures, and standards necessary to assess the
credibility of the ASC codes and models, quantify confidence in ASC calculation
results, and measure the progress in the ASC predictive capabilities. This product
will be the entry point for advanced technologies in support of establishing
credibility in code predictions.
- Primary V&V Assessments: science-based assessments of the predictive
capability and uncertainties in the performance code's primary physics
and related models to support the needs of the SSP. This product evaluates the
models and numerical algorithms pertaining to primary applications. This product
focuses on establishing credibility in primary simulation capabilities.
- Secondary V&V Assessments: delivers science-based assessments of predictive
capability and uncertainties in secondary performance codes and related models
to support the needs of SSP. This product includes the evaluation of secondary
simulations within its functional and operational requirements. Innovative mathematical
techniques and analysis tools (developed by the V&V Methods above) are utilized
to produce assessments at the system, subsystem, and component levels, and they
measure progress in reducing phenomenology in the weapon simulation codes.
- Engineering V&V Assessments: systematic assessments of predictive capability
and uncertainties in engineering codes and related models to support the needs
of SSP. This product focuses on measuring the level of confidence in these code
results that are used to investigate specific physical phenomena and generate
fundamental physical data. The scope of this product includes planning and experiment
design, assessments of software quality, verification assessments, validation
assessments (integral and hierarchical), UQ, predictive accuracy estimation,
- Specialized V&V Assessments: systematic assessments of predictive capability
and uncertainties in specialized and safety codes and related models to support
the needs of SSP. This product focuses on measuring the level of confidence in
the codes results that are used to investigate specific physical phenomena and
generate fundamental physical data. The scope of this product includes planning
and experiment design, SQA, verification assessments, UQ, validation assessments
(integral and hierarchical), predictive accuracy estimation, and documentation.
- Data Validation and Archiving: provides traceable and reproducible work products
and processes for certification (short and long term). The scope of this product
includes integral validation of nuclear data that provide input physical data
for various weapon relevant materials; additionally, this product includes work
product and data archiving and simulation pedigree tracking.