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Launching Science Science Opportunities Provided by NASA's Constellation System (2009) / Chapter Skim
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Appendix D: Definitions for Technology Readiness Levels
Pages 136-137

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From page 136...
... TRL Definition Hardware Description Software Description Exit Criteria 1 Basic principles Scientific knowledge generated Scientific knowledge generated underpinning Peer reviewed observed and underpinning hardware basic properties of software architecture and publication of reported. technology concepts/applications.
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From page 137...
... 5 Component and/ A medium fidelity system/ End-to-end software elements implemented Documented or breadboard component brassboard is built and and interfaced with existing systems/ test performance validation operated to demonstrate overall simulations conforming to target environment. demonstrating in relevant performance in a simulated End-to-end software system, tested in relevant agreement environment.
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Key Terms

  • operational environment
  • readiness levels
  • technology readiness
  • exit criteria
  • prototype implementations

  • trl definition
  • limited documentation
  • thoroughly debugged
  • knowledge generated
  • software description

  • critical scaling
  • basic properties
  • hardware description
  • final product
  • seven levels

  • management requirements
  • demonstrates overall
  • maintenance documentation
  • detailed analysis
  • critical properties

  • validate critical
  • practical application
  • environments defined
  • scaling issues
  • underpinning hardware

  • invention begins
  • included seven
  • trl definitions
  • software exists
  • environment performance


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