It sounds like you're looking for a specific paper or book chapter by on optimization for engineering design, likely in PDF form. Deb is a renowned authority on evolutionary multi-objective optimization (especially NSGA-II).

Genetic Algorithms (GAs)The cornerstone of Deb’s work is the Genetic Algorithm. By using operators like crossover (combining two solutions) and mutation (randomly altering a solution), GAs mimic biological evolution to solve engineering design problems.

front—the set of solutions where you can't improve one objective without making another worse. Impact on Real-World Design