**9. Conclusion**

In this chapter, the authors focus on the applications and benefits of DOE in quality control and assurance. DOE is a very important statistical methodology that enables both scientists, engineers, researchers, and various other professionals to design, develop, and optimize high-quality products and services. DOE has many applications in various fields. Application of DOE ensures high-quality products and services, increases customer satisfaction, efficient resource utilization, cost reduction, enhanced decision making, improves brand reputation, and ensures overall business success. Having presented in this chapter the numerous applications of DOE in various fields, it can be concluded that DOE is a powerful research tool and methodology for quality control and assurance.
