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The Navy is increasingly dependent on networks and associated net-centric operations to conduct military missions, so a vital goal is to establish and maintain dependable networks for ship and multiship (e.g., strike group) networks. In this volume, the authors develop a framework for measuring network dependability that is focused on users' perceptions of whether individual network services are available, as opposed to hardware-focused measurements of whether individual pieces of equipment are functioning. The authors used this framework to modify a tool for modeling network availability that was originally developed by Space and Naval Warfare Systems Command; the modified tool allows the user to perform sensitivity analysis that captures the degree to which individual network components affect overall mission operational availability. The authors walk the reader through some exemplar analyses, then conclude with recommendations on how the Navy might facilitate future network dependability assessments, provide more meaningful results to network engineers, and, ultimately, enhance the dependability of networks across the fleet.
Table of Contents
Chapter One
Introduction
Chapter Two
Measures of Dependability
Chapter Three
Drivers of Dependability
Chapter Four
Data Sources
Chapter Five
Modeling a Service: Examples Using SameTime Chat and the COP Service
Chapter Six
A New and Improved Tool to Calculate Ao
Chapter Seven
Exemplar Analysis Using the New Tool
Chapter Eight
Conclusions, Recommendations, and Next Steps
Appendix A
RAND Review of Initial SPAWAR Tool
Appendix B
Detailed Analysis of Human Error in CVN Networks
Appendix C
Network Diagram of the COP Service
Research conducted by
The research described in this report was prepared for the United States Navy. The research was conducted in the RAND RAND National Defense Research Institute, a federally funded research and development center sponsored by the Office of the Secretary of Defense, the Joint Staff, the Unified Combatant Commands, the Department of the Navy, the Marine Corps, the defense agencies, and the defense Intelligence Community.
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