1.Engineering optimization.- 2.Enhancing Machining Performance through Multi-Objective Harris Hawk Optimization.- 3.Enhancing natural convection in an isosceles triangular shaped chamber through Multi-Objective Whale Optimization Algorithm.- 4.Multi-objective design optimization of parabolic trough collectors using a Grey Wolf Optimization.- 5.Multi-objective optimization of a Honeycomb heat sink using Sunflower Optimization algorithm.- 6.Multi-objective optimization of a small sized solar PV-T water collector using an Imperialistic Competitive Algorithm.- 7.Multi-objective optimization of multi-channel cold plate under intermittent pulsating flow using Jaya Algorithm.- 8.Multi-objective optimization of a rectangular microchannel heat sink using Thermal Exchange Optimization Algorithm.- 9.Multi-objective optimization of a solar-driven generation plant using Grasshopper Optimization Algorithm.- 10.Multi-objective optimization of Cutting Parameters and Tool Geometry using Cuckoo Search Algorithm.- 11.Future Trends and Challenges in Engineering Optimization.