• Corpus ID: 109750212

Design Development Test and Evaluation (DDT and E) Considerations for Safe and Reliable Human Rated Spacecraft Systems

  title={Design Development Test and Evaluation (DDT and E) Considerations for Safe and Reliable Human Rated Spacecraft Systems},
  author={James Miller and Jay L. Leggett and Julie A. Kramer-White},
A team directed by the NASA Engineering and Safety Center (NESC) collected methodologies for how best to develop safe and reliable human rated systems and how to identify the drivers that provide the basis for assessing safety and reliability. The team also identified techniques, methodologies, and best practices to assure that NASA can develop safe and reliable human rated systems. The results are drawn from a wide variety of resources, from experts involved with the space program since its… 
A Systematic Process for Assessing Human Spacecraft Designs in Terms of Relative Safety and Operational Characteristics
Higdon, Kevin Paul (Ph.D., Aerospace Engineering Sciences) A Systematic Process for Assessing Human Spacecraft Designs in Terms of Relative Safety and Operational Characteristics Thesis directed by
Characterizing Human Spacecraft Safety and Operability Through a Minimum Functionality Design Methodology
A systematic methodology is presented for defining a minimum functionality baseline configuration of a human spacecraft. To estimate a lower bound for the spacecraft mass, a set of essential
Survey and assessment of crew performance evaluation methods applicable to human spacecraft design
Space is an unforgiving environment where the actions of the crew play a critical role in their health and safety. Given the limited number of crewmembers typically onboard a spacecraft and the
An exploration of PRA methodology used in spacecraft design
In order to achieve an optimal design of a complex space system that meets all constraints, the requirements placed upon the performance, mass, cost, and risk of the system must be considered,
Comparative analysis of static and dynamic probabilistic risk assessment
This study examines three different methodologies for producing loss-of-mission (LOM) and loss-of-crew (LOC) risks estimates for probabilistic risk assessments (PRA) of crewed spacecraft. The three
Lunar Landing Operational Risk Model
Characterizing the risk of spacecraft goes beyond simply modeling equipment reliability. Some portions of the mission require complex interactions between system elements that can lead to failure
ANALYSIS OF HUMAN SPACE FLIGHT SAFETY Report to Congress Independent Study Mandated by Commercial Space Launch Amendments Act of 2004 (Public Law 108-492)
What are the standards of safety and concepts of operation that should guide the regulation of human space flight? Should they vary by class or type of vehicle, the purpose of flight, or other
Quantifying ECLSS Robustness for Deep Space Exploration
Human exploration of deep space will require Environmental Control and Life Support Systems of increasing robustness as mission duration and distance from Earth increase. As crews travel to distant
The article presents the issues of qualitative and quantitative assessment of readiness for research and development in the field of aviation technology.


Quantitative reliability and availability assessment for critical systems including software
This paper demonstrates the system-level measurement based approach to software reliability prediction methodologies using a simplified safety protection system example, and a tool called MEADEP, which is now under development, is described.
Cleanroom software engineering for flight systems: A preliminary report
  • M. Deck, B. Hines
  • Computer Science, Engineering
    1997 IEEE Aerospace Conference
  • 1997
This paper describes how Cleanroom software engineering practices are being applied to a systems integration testbed for a flight scientific instrument, and how the Cleanroom process was tailored by the project team members.
Test Planning Approach and Lessons
As NASA began technology risk reduction activities and planning for the next generation launch vehicle under the Space Launch Initiative (SLI), now the Next Generation Launch Technology (NGLT)
REIMR: A Process for Utilizing Propulsion-Oriented 'Lessons-Learned' to Mitigate Development Risk
This paper is a summary overview of a study conducted a t the NASA Marshall Space Flight Center (MSFC) during the initial phases of the Space Launch Initiative (SLI) program to evaluate a large
The Role of Software in Recent Aerospace Accidents
In the process of a research project to evaluate accident models, I looked in detail at a variety of spacecraft and aircraft accidents that in some way involved software [8]. The accidents studied
Reliability and crew safety assessment for a solid rocket booster/J-2S launcher
NASA's exploration mission directorate is currently developing plans to carry out the President's vision for space exploration. This plan includes retiring the Space Shuttle by 2010 and developing
Lessons Learned From the Development, Operation, and Review of Mechanical Systems on the Space Shuttle, International Space Station, and Payloads
The Mechanical Design and Analysis Branch at the Johnson Space Center (JSC) is responsible for the technical oversight of over 30 mechanical systems flying on the Space Shuttle Orbiter and the
Evaluation of software dependability based on stability test data
  • D. Tang, M. Hecht
  • Computer Science
    Twenty-Fifth International Symposium on Fault-Tolerant Computing. Digest of Papers
  • 1995
The paper discusses a measurement-based approach to dependability evaluation of fault-tolerant, real-time software systems based on failure data collected from stability tests of an air traffic
Technologies for improving the dependability of software-intensive systems: review of NASA experience
  • G. Stark
  • Computer Science
    Proceedings of Annual Reliability and Maintainability Symposium (RAMS)
  • 1994
NASA SR&QA should develop a strategy to integrate techniques such as best current practice, complexity measurement, fault tolerance, formal methods, and software reliability into the agency reliability plan.
A Practical Tutorial on Modified Condition/Decision Coverage
This tutorial provides a practical approach to assessing modified condition/decision coverage (MC/DC) for aviation software products that must comply with regulatory guidance for DO-178B level A