System Dependability Assessment Tool

Period of Performance: 12/21/1994 - 12/21/1996


Phase 2 SBIR

Recipient Firm

Advanced System Technologies, Inc.
12200 E. Briarwood Avenue, Suite 260
Englewood, CO 80112
Principal Investigator

Research Topics


Dependability is an increasingly critical charactreristic of the Navy's mission critical computer systems. These systems must be maintained in a state of readiness to support critical mission function s, and must be able to perform these functions correctly despite the presence of faultsd in system components, and in the environments in which the systems operate. Automated tools are needed to assist in specifying andf evaluating dependability characteristics of Navy computer system designs, and in balancing dependabilikty against other system attributes such as performance, security, and cost. Phase I reseach demonstrated the feasibility of an automated system dependability assessment tool (SDAT) for assessment of mission critical computer system dependability. Phase II will develop a full operational prototype SDAT. The prototype SDAT will consist of a dependability specification component, that allows interactive creation and manipulation of system design representations, and a dependability evaluation component, that automatically translates system design descriptions into mathematical models, and computers a range of quantitative dependability metrics. Phase II will also produce integration technologies that will allow SDAT to interoperate with other Navy information models and system engineering tools, and a series of examples that will validate the utility and SDAT for dependability assessment of actual Navy systems.