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A framework for software reuse in safety-critical system of systems

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Author
Warren, Bradley R.
Date
2008-03
Advisor
Michael, James B.
Shing, Mantak
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Abstract
This thesis concerns the effective and safe software reuse in safety-critical system-of-systems. Software reuse offers many unutilized benefits such as achieving rapid system development, saving resources and time, and keeping up technologically in an increasingly advancing global environment. System software needs to be designed for both reuse and safety and available information shared effectively. We introduce a process neutral framework for software reuse in safety-critical system of systems. That framework consists of four elements: organizational factors, component attributes, component specification, and safety analysis. We developed a model (C5RA) to capture the relevant component information and assist in specification matching. We conducted a survey of software safety metrics, created metrics, and developed a ranking. We applied the framework utilizing the reuse of a generic avionics software component. Our key findings are that congruence between all elements is required; software should posses certain attributes with metrics that support a safe design; software component information can be specified using C5RA; and a process was identified for a system-of-systems hazard analysis for software reuse. The framework outlined provides a solution that enables effective software reuse in safety-critical system of systems.
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http://hdl.handle.net/10945/4142
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