The book "Fuzzy Applications in Industrial Engineering" offers a comprehensive analysis of the application of fuzzy set theories in the field of Industrial Engineering (IE). It addresses the challenges engineers face in designing and improving integrated systems of people, materials, equipment, and energy, particularly when incomplete or vague information is present. Following an introductory chapter that explains the current state of fuzzy sets in IE, specific application areas are discussed where fuzzy set theories can make significant contributions. These areas include, among others, control and reliability, engineering economics, group and multi-criteria decision-making, as well as human factors and ergonomics. Each chapter includes didactic numerical applications that enhance the understanding of the concepts and illustrate their practical relevance.