Which resource is typically quantifiable in a life cycle assessment?

In a life cycle assessment (LCA), quantifiable resources include those that can be measured or calculated in terms of volume, energy, or material. Water and energy usage fit perfectly into this category because they can be precisely quantified during the production, use, and disposal stages of a product's life cycle. For instance, an assessment might include the total liters of water used in production or the kilowatt-hours of energy consumed during manufacture and operation.

Conversely, the color of the product is subjective and cannot be measured in a numeric way, making it unquantifiable within LCA. Similarly, while human involvement is an important aspect of sustainability assessments, it is more qualitative and does not lend itself to precise measurement like resource usage. Marketing expenses also do not directly relate to the environmental impact or resource consumption assessed in an LCA, as they pertain more to the economic side of products rather than their lifecycle in relation to resource use.