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New Directions in Probabilistic AssessmentNew Directions in Probabilistic Assessment
Henk Roelant, LaRCHenk Roelant, LaRCJoanne Bechta Dugan, University of VirginiaJoanne Bechta Dugan, University of Virginia
Kevin Sullivan, University of VirginiaKevin Sullivan, University of Virginia
October 26, 2000October 26, 2000
ASSAPASSAP: Advanced System Safety : Advanced System Safety Assessment ProgramAssessment Program
• Dynamic Fault Tree analysis: a new approach to Dynamic Fault Tree analysis: a new approach to determining the probability of failure for complex determining the probability of failure for complex systemssystems
• Galileo/ASSAP: a software tool for DFT analysis Galileo/ASSAP: a software tool for DFT analysis developed at University of Virginia under the developed at University of Virginia under the sponsorship of LaRCsponsorship of LaRC
• Galileo/ ASSAP analyzes the probability of failure for Galileo/ ASSAP analyzes the probability of failure for complex systems (i.e. the “P” in PRA)complex systems (i.e. the “P” in PRA)
ASSAP DevelopmentASSAP Development
Being developed under NAS1-99098 (UVA)- 32 month effort (March 1999-November 2001) -$675,000 provided by NASA Code Q -Builds on 10 years worth of academic research funded by NSF, NASA and industry
Beta version of Galileo/ASSAP currently available for review.
Integrated efforts in software engineering and reliability engineering
Usable interoperable software environment using Commercial-Off-The-Shelf (COTS) components such as MS Word, MS PowerPoint and Visio
Demonstration of capabilities ...
User InterfaceUser Interface
Textual EditingTextual Editing
Rendering Graphical ViewRendering Graphical View
Low-Level EditingLow-Level Editing
Sensitivity AnalysisSensitivity Analysis
High-Level EditingHigh-Level Editing
Send To New PageSend To New Page
Connect GatesConnect Gates
Select SubtreeSelect Subtree
Render To TextualRender To Textual
Save & CloseSave & Close
Analyze Sage IIIAnalyze Sage III
Galileo/ASSAPGalileo/ASSAP Galileo/ASSAP is a promising new approach to
probabilistic analysis of critical systems
Sets a new standard for the “P” in PRA
Interested in reviewing the Beta version? Looking for beta testers (a few initially)
Contact Henk Roelant at NASA Langley [email protected]
757-864-1741
