Research Results | Integrating Software Into Probabilistic Risk Assessment


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Integrating Software Into Probabilistic Risk Assessment
Point of Contact	Carol Smidts csmidts@eng.umd.edu
Dates	October 2000 - September 2003
Problem	Probabilistic Risk Assessment (PRA) is a technique to assess the probability of failure or success of a mission. Current PRA neglects the contribution of software to the risk of failure of the mission. The current proposal is to extend current PRA method ology to integrate software in the risk assessment process. It is proposed that the approach developed be applied to Next Generation Space Telescope (NGST) software.
Objective	The objective is to develop the techniques necessary for the systematic integration of software in PRA and to prove the conceptual validity of the methodology on a specific sub-system of the Next Generation Space Telescope.
Results	2001 End of Year Briefing.ppt Brief Report Reflecting Comments from Experts Panel on Methodology.doc Defining Impact of Software on PRA.doc Defining Software Quantification Models.doc End of Year Briefing 2002 - PRA Training.ppt Integrating Software Into Probabilistic Risk Assessment - Final Report.doc OSMA SAS 2002 Presentation.ppt Report Describing Changes to Space Station PRA.doc Report Describing Changes to the Space Station PRA Quantification.doc Report Describing the Final Modeling Representation.doc SAS 05 Technical Presentation.ppt SAS 05 Executive Presentation.ppt Report describing the analytical propagation approach.doc SAS 06 Technical Presentation.ppt Report describing the PRA procedure (Test-Based and Analytical).doc Final Report Containing the Procedures Guide.doc SAS 06 Executive Presentation.ppt
Keywords	probabilistic risk assessment, risk cube, risk assessment, software failures
Categories	Criticality Analysis Design Analysis Formal Methods Issue & Risk Tracking Process Improvement Traceability Analysis

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