Factors influencing software quality, standards for software quality assurance, Software Quality Models: six sigma, experience factory, Capability Maturity Model, measures of quality, error rates, models of failure, probabilistic models, concept of a measurement environment for quality, design of experiments for quality measurement, use of metrics in quality control, reliability issues, robustness, design strategies for reliable software, N-version programming, merits and demerits, recovery techniques, roll-back of various levels the relationship between software reliability and database, reliability estimation, advanced issues in testing, test-based system and drivers are examined in this unit.

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