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Probabilistic Risk Assessment for Decision Making during Spacecraft Operations

by Meshkat, Leila

The focus of this paper is on describing the particular methods used for PRA modeling during the operational phase of a spacecraft by gleaning insight from recently conducted case studies on two operational Mars orbiters...

  • Filetype: pdf
  • Publish date: 2009-02
  • Keywords:RAMS 2009 Proceedings,Probabilistic Risk Assessment, Safety and Risk Management, Weibull

PMF Series for Availability and Reliability Probabilistic Assessments

by Smith, Jan B.

PMF series (a contiguous family of probability mass functions) is a new method for probabilistic assessment of availability and reliability of both repairable and nonrepairable systems...

  • Filetype: pdf
  • Publish date: 2009-02
  • Keywords:RAMS 2009 Proceedings,Risk Assessment, Availability, Reliability and Availability Assessment

Reliability and Quality of Service in Weighted Probabilistic Networks using Algebraic Decision Diagrams

by Bobbio, Andrea; Terruggia, Roberta

We discuss two types of interpretation of weights: weights as distances and weights as capacities. Correspondingly, two different algorithms based on a data structure called Algebraic Decision Diagram (ADD), are discussed and presented...

  • Filetype: pdf
  • Publish date: 2009-02
  • Keywords:RAMS 2009 Proceedings,Networks, System Reliability, Probabilistic Risk Assessment

Concept for the NASA Risk and Reliability Data Collection and Analysis Environment

by Groen, Frank J.; Smith, Curtin Lee

This paper describes the concept of a data collection and analysis environment that is being developed to support the collection, analysis, and distribution of R&M data...

  • Filetype: pdf
  • Publish date: 2009-02
  • Keywords:RAMS 2009 Proceedings,Probabilistic Risk Assessment, Bayesian Analysis, Data Analysis

Analysis Classes for Space Exploration Reliability Assessments

by Franzini, Benjamion J.; Putney, Blake F.

Understanding and effectively communicating the spectrum of risk and reliability analysis classes is critical for an analyst to contribute to a team working on developmental space exploration architecture, mission, vehicle, or technology design...

  • Filetype: pdf
  • Publish date: 2009-02
  • Keywords:RAMS 2009 Proceedings,Reliability and Availability Assessment, Safety and Risk Management

Risk Analysis for Transportation Projects

by Franklin, Paul H.

This paper discusses application of risk management to transportation projects. Insufficient attention to risk management can lead to significant cost overruns and schedule delays...

  • Filetype: pdf
  • Publish date: 2009-02
  • Keywords:RAMS 2009 Proceedings,Safety and Risk Management, Reliability Model, Probabilistic Risk Assessment

Risk Analysis of Phased-Mission Systems with Multiple Failure Modes

by Kohda, Takehisa; Matsumoto, Satoshi; Nakagawa, Masaki

This paper proposes a novel, simple and practical risk analysis method of phased mission systems with multiple failure modes...

  • Filetype: pdf
  • Publish date: 2008-02
  • Keywords:RAMS 2008 Proceedings,Risk Analysis, Safety and Risk Management, Risk Assessment

Assessment of Launch Vehicle Debris Risk During Ascent Aborts

by Gee, Ken; Mathias, Donovan L.

In the event of a space launch vehicle explosion during ascent, the debris field generated by the explosion poses a risk to the crew. To evaluate this risk, a model of the debris environment was created to determine the probability of a debris strike...

  • Filetype: pdf
  • Publish date: 2008-02
  • Keywords:RAMS 2008 Proceedings,Probabilistic Risk Assessment, Safety and Risk Management

Simulation Assisted Risk Assessment Applied to Launch Vehicle Conceptual Design

by Lawrence,Scott; Mathias, Donovan L. Go, Suzie; Gee, Ken

A simulation-based risk assessment approach is presented and is applied to the analysis of abort during the ascent phase of a space exploration mission...

  • Filetype: pdf
  • Publish date: 2008-02
  • Keywords:RAMS 2008 Proceedings,Probabilistic Risk Assessment, Safety and Risk Management

Blast Overpressure Modeling Enhancements for Application to Risk-Informed Design of Human Space Flight Launch Abort Systems

by Lawrence, Scott; Mathias, Donovan L.

This paper describes recent enhancements to the engineering-level analysis tools used by the Simulation Assisted Risk Assessment (SARA) project at NASA Ames Research Center in evaluating the blast overpressure risk to the crew...

  • Filetype: pdf
  • Publish date: 2008-02
  • Keywords:RAMS 2008 Proceedings,Risk Analysis, Risk Assessment, Safety and Risk Management

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