1 Introduction  
2 Meta-analysis of Multi-Fidelity Optimization Literature: A Text Mining Approach  
3 Multi-Fidelity Surrogate Modeling  
4 Optimizer for Multi-Fidelity Optimization  
5 Fidelity Management Strategies  
6 Benchmark Test Problems in Multi-Fidelity Optimization  
7 Applications of Multi-Fidelity Optimization  
8 Challenges and Future Opportunities  
9 Conclusion  