The document presents the second progress presentation on test effort estimation in regression testing. It outlines the problem statement, literature review on test effort estimation and regression testing, critical analysis, and references. The literature review covers 5 papers on test effort estimation models and techniques, and 5 papers on regression testing techniques including code coverage, historical value-based approaches, UML design mapping, hybrid approaches, and spectrum-based fault localization. The critical analysis compares the papers on parameters like time, cost, and complexity. The conclusion is that the work focuses on test effort estimation and regression testing methods, and future work will analyze approaches for regression test selection.