Tag: Related study objective: comparative assertion
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G-09 Object of assessment with regard to energy-efficient build-ings
Aspect G-09 Object of assessment with regard to energy-efficient buildings Description Life cycle assessment is a flexible methodology that can be applied to all kinds of product or building. It is important to specify whether the LCA methodology has to be adapted in terms of system boundaries or cut-off rules when applying it to an…
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G-10 Definition of system boundaries for products
Aspect G-10 Definition of system boundaries for products Description The system boundaries of product LCA can be different, depending on the goal and scope of the study. If the goal is to create an EPD, then the practitioner is likely to follow the EN 15804 standards. But even for EPD, the system boundaries can vary,…
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G-10 Definition of system boundaries for new buildings
Aspect G-10 Definition of system boundaries for new buildings Description A clear definition of the system boundaries is needed for improved understanding and interpretation of the LCA results, as well as to enable them to be used for comparative assertions (e.g. choice of design alternatives) or stand-alone LCA (e.g. benchmarking purposes).How should this system boundary…
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G-11 Definition of system boundaries for existing buildings
Aspect G-11 Definition of system boundaries for existing buildings Description A clear definition of the system boundaries is needed to understand and interpret the LCA results better, as well as to use them for comparative assertions (e.g. choice of design alternatives) or stand-alone LCA (e.g. for benchmarking purposes). How should this system boundary be defined…
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G-12 (Buildings) / G-11 (Products) Cut-off rules for screening, simplified, complete LCA
Aspect G-12 (Buildings) / G-11 (Products) Cut-off rules for screening, simplified, complete LCA Description Cut-off rules enable LCA practitioners to conduct LCA without having to model 100% of the product system. According to the ILCD Handbook, the cut-off criteria refer to the omission of non-relevant life cycle stages, activity types, specific processes and products and…
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G-13 (Buildings) / G-12 (Products) Infrastructure machinery and capital equipment for material production, energy, water, waste and transport for screening and simplified LCA
Aspect G-13 (Buildings) / G-12 (Products) Infrastructure machinery and capital equipment for material production, energy, water, waste and transport for screening and simplified LCA Description Different LCA databases and datasets with different boundaries are available. These databases apply different rules for including or excluding infrastructure in LCA datasets (e.g. owing to database policy or cut-off-rules).…
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G-14 (Buildings) / G-13 (Products) Infrastructure machinery and capital equipment for material production, energy, water, waste and transport for complete LCA.
Aspect G-14 (Buildings) / G-13 (Products) Infrastructure machinery and capital equipment for material production, energy, water, waste and transport for complete LCA. Description Various LCA databases and datasets with different boundaries are available. These databases apply different rules on the inclusion or exclusion of infrastructure in LCA datasets (e.g. owing to database policy or cut-off-rules).…
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G-15 (Buildings) / G-14 (Products) Transport of goods in LCA studies
Aspect G-15 (Buildings) / G-14 (Products) Transport of goods in LCA studies Description With globalized supply chains, logistic processes occur throughout the life cycle of every product. The most important ones are transport processes, where several possibilities exist for the activity of carrying goods (e.g. by truck, ship or airplane) for the various life cycle…
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G-16 (Buildings) / G-15 (Products) Accounting for carbon storage/carbon sequestration
Aspect G-16 (Buildings) / G-15 (Products) Accounting for carbon storage/carbon sequestration Description Some products (e.g. wooden products) take up atmospheric carbon dioxide while producing biomass. Concrete- and lime-based products can also take up atmospheric carbon dioxide through recarbonization during the use phase . By using these materials or products, this fixed CO2 is stored during…
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G-17 Differences in background data system boundaries
Aspect G-17 Differences in background data system boundaries Description Currently, practitioners have to deal with various different data sources, such as public or commercial LCI databases, EPDs, literature, etc. All these data have been calculated by applying different rules, and so special attention has to be paid to assessing the consistency of these different sources.…