Chapter 07 · Materials & footprintsLife Cycle Assessment & Product Footprinting
Life cycle inventory (LCI)
Definition
Life cycle inventory is the data-collection stage of life cycle assessment that quantifies inputs, outputs and emissions for the assessed system.
References
This reference provides supporting context for how “Life cycle inventory (LCI)” is defined and used.
Overview
What it means in practice
Life cycle inventory (LCI) should be read as an assessment-method term. Its meaning depends on the study goal, system boundary, data quality and comparison being made.
In practice, users should state the boundary, material route, measurement method and evidence. That keeps life cycle inventory (lci) clear enough to support review without turning it into a broad claim.
Why it matters
Life cycle inventory (LCI) matters because LCA language shapes what is counted, compared and communicated. Clear definitions help readers see whether a result is methodological, measured or assumed.
Common misconception
A common error is to treat Life cycle inventory (LCI) as neutral or automatic. The stronger approach is to explain the modelling choice and how it affects interpretation.
Review questions
What boundary or material route is being described? What evidence supports the term? What condition, timeframe or modelling choice should be stated before a reader relies on it?
How it is used
In professional practice, “Life cycle inventory (LCI)” helps designers, manufacturers, procurement teams, life-cycle practitioners and waste managers describe or assess the data-collection stage of life cycle assessment that quantifies inputs, outputs and emissions for the assessed system.
It is commonly encountered in product design, procurement, footprinting, material selection, production and end-of-life decisions. A credible application identifies the product system, life-cycle stages, functional unit, geography, timeframe and measurement method.