This book offers a comprehensive guide to the various research methodologies used within engineering and applied sciences, addressing both theoretical and practical aspects. It explores essential techniques such as experimental design, data analysis, computational modeling, and qualitative methods. With sections dedicated to emerging technologies, interdisciplinary research, and real-world case studies, the book is designed to help students, researchers, and professionals effectively plan, conduct, and analyze research projects. Emphasizing a hands-on approach, it provides readers with a solid foundation for making informed methodological choices in fields ranging from mechanical engineering to applied physics and computer science.