In recent times, energy conservation and environmental protection have attracted
more and more attention. This research presents a comparative study on the
quantitative analysis and comprehensive ranking of the cradle-to-grave
environmental benefits of a multi-material body shell across 18 countries. For
quantitative analysis of the cradle-to-grave environmental impact of the body
shell, life cycle assessment (LCA) was adopted to assess the process of
interactions between the environment and human activity. For a comprehensive
ranking of the environmental impacts across 18 nations, two modified techniques
were used for order preferences by similarity to the ideal solution (TOPSIS)
methods, which are improved by the fuzzy analytic hierarchy process (FAHP) and
entropy method (EM). The outcomes from these three methodologies;
FAHP&EM-TOPSIS, FAHP-TOPSIS, and conventional TOPSIS revealed that the
comprehensive environmental benefit rankings of TOPSIS are highly different from
the two improved TOPSIS methods, which shows the superiority of modified TOPSIS.
The common results of the three measurement methodologies were that New Zealand
has the best environmental benefit and Mexico’s environmental performance is the
worst. Based on the two modified TOPSIS methods used in this study, the
comprehensive environmental benefit resulting from the multi-material body shell
in various countries can be compared and analyzed accurately and subjectively.
Lastly, the obtained results underscore the illumination, usefulness, and
practicality of the modified TOPSIS.
