Chapter 1. Introduction.- Chapter 2. Basic Selective Maintenance Model.- Chapter 3. Selective Maintenance for Multi-State Systems Under Imperfect Maintenance.- Chapter 4. Selective Maintenance for Multi-State Systems with Loading Strategy.- Chapter 5. Selective Maintenance under Stochastic Time Durations of Breaks and Maintenance Actions .- Chapter 6. Robust Selective Maintenance under Imperfect Observations .- Chapter 7. Selective Maintenance and Inspection Optimization for Partially Observable Systems.- Chapter 8. Selective Maintenance for Systems Operating Multiple Consecutive Missions.- Chapter 9. Dynamic Selective Maintenance for Multi-State Systems Operating Multiple Consecutive Missions.