Regression Testing Techniques Obsolete Test case elimination Test Suite Program Test Suite T Accounts for 50% of the cost of software maintenance Test Suite T Test Suite Test Suite Program T T st St PRegression Testing Techniques 3 Program P Program P’ Test Suite T Test Suite T’ Test Suite T’ Test Suite T’ Test Suite T’ Test Suite T Obsolete Test Case Elimination Test Case Augmentation Test Case Prioritization Test Case Reduction Test Case Selection Accounts for 50% of the cost of software maintenance