Roger Z. Ríos-Mercado is a professor of operations research in the Graduate Program in Systems Engineering at the Department of Mechanical and Electrical Engineering, Universidad Autónoma de Nuevo León, Mexico. He holds a PhD in Operations Research from the University of Texas at Austin. He has held visiting scholar positions at the University of Texas at Austin, Barcelona Tech, University of Colorado, and University of Houston. His research interests are mainly in designing and developing efficient solution methods to hard discrete optimization problems. He has addressed applied decision-making problems on districting, location analysis, healthcare, natural gas transportation systems, and scheduling. His research has been published in leading journals in the field. He has authored or coauthored, as editor, 2 books and 12 volumes of journal special issues in diverse areas of operations research and discrete optimization. He is currently an editor of Computers & Operations Research and a member of the editorial board of Operations Research Perspectives.

• Chapter 1. Research Trends in Optimization of Districting Systems.- Chapter 2. Police Districting Problem: Literature Review and Annotated Bibliography.- Chapter 3. A Review of Districting Problems in Health Care.- Chapter 4. Computational Geometric Approaches to Equitable Districting: A Survey.- Chapter 5. Bounding Procedures and Exact Solutions for a Class of Territory Design Problems.- Chapter 6. Mathematical Programming Formulations for Practical Political Districting.- Chapter 7. Multi-Period Service Territory Design.- Chapter 8. Designing Ambulance Service Districts under Uncertainty.- Chapter 9. Spatial Optimization Problem for Locating Polling Facilities and Stations and Policy Implications.- Chapter 10. Territory Design for Sales Force Sizing.

Roger Z. Ríos-Mercado is a professor of operations research in the Graduate Program in Systems Engineering at the Department of Mechanical and Electrical Engineering, Universidad Autónoma de Nuevo León, Mexico. He holds a PhD in Operations Research from the University of Texas at Austin. He has held visiting scholar positions at the University of Texas at Austin, Barcelona Tech, University of Colorado, and University of Houston. His research interests are mainly in designing and developing efficient solution methods to hard discrete optimization problems. He has addressed applied decision-making problems on districting, location analysis, healthcare, natural gas transportation systems, and scheduling. His research has been published in leading journals in the field. He has authored or coauthored, as editor, 2 books and 12 volumes of journal special issues in diverse areas of operations research and discrete optimization. He is currently an editor of Computers & Operations Research and a member of the editorial board of Operations Research Perspectives.

• Chapter 1. Research Trends in Optimization of Districting Systems.- Chapter 2. Police Districting Problem: Literature Review and Annotated Bibliography.- Chapter 3. A Review of Districting Problems in Health Care.- Chapter 4. Computational Geometric Approaches to Equitable Districting: A Survey.- Chapter 5. Bounding Procedures and Exact Solutions for a Class of Territory Design Problems.- Chapter 6. Mathematical Programming Formulations for Practical Political Districting.- Chapter 7. Multi-Period Service Territory Design.- Chapter 8. Designing Ambulance Service Districts under Uncertainty.- Chapter 9. Spatial Optimization Problem for Locating Polling Facilities and Stations and Policy Implications.- Chapter 10. Territory Design for Sales Force Sizing.