Page 286 - Materials Chemistry, Second Edition
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A Comparison of Life Cycle Assessment Studies 277
4 Key Issues
Life cycle assessment is carried out in phases (ISO 14044 2006; European
Commission 2010a, b), and different phases of LCA are presented in Fig. 2.
Various key issues in a LCA system of any process to product such as biofuel are
scope and functional unit, reference system, system boundary, data source, allo-
cation, inventory analysis, impact assessment, and sensitivity analysis (Singh et al.
2010; Askham 2012).
Fig. 2 Various phases of life cycle assessment
