1. New Directions in Probabilistic Assessment Henk Roelant, LaRC Joanne Bechta Dugan, University of Virginia Kevin Sullivan, University of Virginia October 26, 2000

2. ASSAP: Advanced System Safety Assessment Program Dynamic Fault Tree analysis: a new approach to determining the probability of failure for complex systemsDynamic Fault Tree analysis: a new approach to determining the probability of failure for complex systems Galileo/ASSAP: a software tool for DFT analysis developed at University of Virginia under the sponsorship of LaRCGalileo/ASSAP: a software tool for DFT analysis developed at University of Virginia under the sponsorship of LaRC Galileo/ ASSAP analyzes the probability of failure for complex systems (i.e. the “P” in PRA)Galileo/ ASSAP analyzes the probability of failure for complex systems (i.e. the “P” in PRA)

3. ASSAP 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...

4. User Interface

5. Textual Editing

6. Rendering Graphical View

7. Low-Level Editing

8. Sensitivity Analysis

9. High-Level Editing

10. Send To New Page

11. Connect Gates

12. Select Subtree

13. Render To Textual

14. Save & Close

15. Analyze Sage III

16. Galileo/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 h.a.roelant@larc.nasa.gov 757-864-1741