Tag: Study type: Simplified LCA
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G-35 (Buildings) / G-33 (Products) Normalization of indicators
Aspect G-35 (Buildings) / G-33 (Products) Normalization of indicators Description According to the ILCD Handbook, the normalization step refers to the expression of indicators (LCIA, midpoints or endpoints) relative to a common reference by dividing the indicator results by the respective reference value. Different normalization factors can be applied in practice to help the interpretation…
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G-36 (Buildings) / G-34 (Products) Weighting of indicators
Aspect G-36 (Buildings) / G-34 (Products) Weighting of indicators Description According to the ILCD Handbook, the weighting step refers to an optional step of the ISO 14044 standard to support the interpretation of the profile as a fully aggregated result. Generally speaking, it is a subsequent step to the normalization of indicators (see aspect ‘normalization’),…
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G-37 (Buildings) / G-35 (Products) Uncertainty analysis for comparative assertion
Aspect G-37 (Buildings) / G-35 (Products) Uncertainty analysis for comparative assertion Description An uncertainty analysis measures the variability of the data values: for example, a low variance leads to a high precision. Because of the long supply chain of building products and buildings as a whole, uncertainties are aggregated over the life cycle. Following [Huijbregts…
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G-38 (Buildings) / G-36 (Products) Sensitivity analysis
Aspect G-38 (Buildings) / G-36 (Products) Sensitivity analysis Description According to the ILCD Handbook, the goal of a sensitivity analysis is to assess the reliability of the study by adjusting the main parameters to see how this affects the final results. It is part of the interpretation step, and is generally used together with complementary…
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G-39 (Buildings) / G-37 (Products) Scenario analysis
Aspect G-39 (Buildings) / G-37 (Products) Scenario analysis Description Scenario analyses usually refer to future conditions that cannot be fully known by the time the LCA study is conducted. However, the uses of scenarios can meet different goals. Scenarios can look backwards or forwards, and can be linked to different applications. For example, a product…
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G-40 (Buildings) / G-38 (Products) Communication of LCA results
Aspect G-40 (Buildings) / G-38 (Products) Communication of LCA results Description The external and internal communication of LCA results is still error-prone. How should results be communicated? How should they be presented with regard to different experience levels of the audience? related study objective ☒ stand-alone LCA ☒ comparative assertion related study phase ☐ ☐…
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G-41 (Buildings) / G-39 (Products) Reproducibility
Aspect G-41 (Buildings) / G-39 (Products) Reproducibility Description Reproducibility is an important aspect of the reporting step in life cycle assessment. According to ISO 14044 and the ILCD Handbook, it is characterized by providing comprehensive documentation on data, assumptions, calculation rules etc. that would allow an independent reviewer to adequately reproduce the results and the…
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G-42 (Buildings) / G-40 (Products) Life cycle inventory documentation
Aspect G-42 (Buildings) / G-40 (Products) Life cycle inventory documentation Description In order to fulfil the reproducibility requirement of a project, documentation of life cycle inventory datasets is very important. What level of detail makes sense? related study objective ☒ stand-alone LCA ☒ comparative assertion related study phase ☐ ☐ ☐ ☐ ☒ goal and…
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G-43 Documentation of LCA results
Aspect G-43 Documentation of LCA results Description Each LCA study has to be documented by means of an LCA report to demonstrate compliance with existing LCA standards (e.g. [ISO 14040], [ISO 14044] or [EN 15804], [EN 15978]). The hypotheses, methodological choices and LCA results are reported. However, how can be such a report be structured/documented…
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G-44 (Buildings) / G-41 (Products) Critical review
Aspect G-44 (Buildings) / G-41 (Products) Critical review Description A critical review may be needed, especially if comparative results are intended to be disclosed to the public.How should this aspect be considered for building and product LCA? related study objective ☒ stand-alone LCA ☒ comparative assertion related study phase ☐ ☐ ☐ ☐ ☒ goal…