1 Introduction  
2 Methodology  
2.1 Collection Approach  
2.2 Threats to Validity  
3 RQ1: Origins, Trends, and Prominent Papers  
Conclusions — RQ1: Origins, Trends, and Prominent Papers  
4 RQ2: Similarity Metrics  
Conclusions — RQ2: Similarity Metrics  
5 RQ3: Artefacts  
Conclusions — RQ3: Artefacts  
6 RQ4: Problems  
6.1 Test Data Generation  
6.2 Test Case Prioritization  
6.3 Test Suite Reduction  
6.4 Test Case Selection  
6.5 Test Suite Quality Evaluation  
6.6 Fault Localization  
Conclusions — RQ4: Problems  
7 RQ5: Subject Domains  
Conclusions — RQ5: Subject Domains  
8 RQ6: Tools  
Conclusions — RQ6: Tools  
9 Future Research Directions  
9.1 Areas of Applying DBT Techniques  
9.2 Diversity-Based Subjects  
9.3 Tool Support  
9.4 Guidelines for Selecting the Diversity Parameters  
9.5 Exploring Other Diversity Artefacts  
10 Conclusions