Functional Unit: Definition and Examples

This lecture introduces the concept of functional unit in the life cycle analysis, focusing on defining the function of a product system and its quantitative description. Examples illustrate how to define a functional unit using action verbs and quantitative measures, emphasizing the importance of consistency with study objectives. The lecture also covers the characteristics of a functional unit, such as measurability, additivity, and its role as a reference unit in life cycle analysis. The instructor explains how to formulate a functional unit by answering key questions related to time, quantity, location, and quality. Practical examples include defining a functional unit for transportation and beverage containment scenarios.