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System and Software Reliability
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Point of Contact
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Dolores Wallace
Dolores.R.Wallace.1@gsfc.nasa.gov
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Dates
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January 2003 - January 2005
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Problem
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Within the last decade better reliability models (hardware, software, system) than those currently used have been theorized and developed but not implemented in practice. Previous research on software reliability has shown that while some existing software reliability models are practical, they are not accurate enough. New paradigms of development (e.g. OO) have appeared and associated reliability models have been proposed but not investigated. Hardware models have been extensively investigated but not integrated into a system framework. System reliability modeling is the weakest of the three. NASA engineers need better methods and tools to demonstrate that their products meet NASA requirements for reliability measurement.
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Objective
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For the new models for the software component of the last decade, there is a great need to bring them into a form that they can be used on software intensive systems. The Statistical Modeling and Estimation of Reliability Functions for Systems (SMERFS^3) tool is an existing vehicle that may be used to incorporate these new modeling advances. Adapting some existing software reliability modeling changes to accommodate major changes in software development technology may also show substantial improvement in prediction accuracy. With some additional research, the next step is to identify and investigate system reliability. System reliability models could then be incorporated in a tool such as SMERFS^3. This tool with better models would greatly add value in assessing GSFC projects.
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Results
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No results are available at this time. Please check back again.
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Keywords
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reliability models, software reliability, reliability measurement, system reliability assessment
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Categories
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Software Reliability
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