65 research outputs found
Multiple Fault Isolation in Redundant Systems
Fault diagnosis in large-scale systems that are products of modem technology present formidable challenges to manufacturers and users. This is due to large number of failure sources in such systems and the need to quickly isolate and rectify failures with minimal down time. In addition, for fault-tolerant systems and systems with infrequent opportunity for maintenance (e.g., Hubble telescope, space station), the assumption of at most a single fault in the system is unrealistic. In this project, we have developed novel block and sequential diagnostic strategies to isolate multiple faults in the shortest possible time without making the unrealistic single fault assumption
Multiple Fault Isolation in Redundant Systems
Fault diagnosis in large-scale systems that are products of modern technology present formidable challenges to manufacturers and users. This is due to large number of failure sources in such systems and the need to quickly isolate and rectify failures with minimal down time. In addition, for fault-tolerant systems and systems with infrequent opportunity for maintenance (e.g., Hubble telescope, space station), the assumption of at most a single fault in the system is unrealistic. In this project, we have developed novel block and sequential diagnostic strategies to isolate multiple faults in the shortest possible time without making the unrealistic single fault assumption
Model-Based Organization Analysis and Design for an ESG Organization
11th Command and Control Research and Technology Symposium (CCRTS), June 20-22, 2006, San Diego, C
Congruence of Human Organizations and Missions: Theory versus Data
1999 Command and Control Research and Technology Symposium (CCRTS), June 29 - July 1, 1999, U.S. Naval War College, Rhode IslandIn this paper, we present a methodology for quantifying the degree of fit between a mission and an
organization based on the closeness between the task structure (i.e., resource requirements and task
interdependence) and the DM-asset allocation across the organization (i.e., amount and distribution
of resource capabilities among DMs, and organizational processes). This closeness is based on
three main characteristics of organizational performance: workload balance, communication
requirements, and DM-DM dependence. These characteristics are affected, in turn, by the
interactions and interdependencies of the organizational processes and the demands of the mission
scenario. Invariably, coordination is essential to achieve good performance because the
information required for decisionmaking is often distributed. However, excessive DM-DM
communication and coordination are harmful to performance, since they increase the processing
workload/overhead that delays task execution. Performance improvements can be obtained by
changing the structure and processes of an organization to decrease the requisite coordination,
while balancing the levels of workload across the organization and reducing inter DM dependence.This work was supported by the Office of Naval Research under contract # N00014-00-1-0101
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