Max Weber's interpretation of rationalisation refers to the process of applying logic and efficiency to social, economic, and cultural practices. George Ritzer, on the other hand, coined the term "McDonaldization" to describe the rationalisation of society based on principles of fast food production, emphasizing efficiency, calculability, predictability, and control. While both theorists highlight the influence of rationalisation on modern society, Weber focuses on a broader concept of rationalisation, while Ritzer offers a more specific application through the McDonaldization theory.