Engineering consulting firms, like other knowledge‐based enterprises, take intellectual capital as their most important asset embedded in the organisation. This research aims to analyse the correlation between intellectual capital and business performance. The questionnaire was sent to all Taiwan's engineering consulting firms, and 101 copies were collected. It was found that, among these engineering consulting firms, the structural capital and relational capital show better performance, while human capital has poorer performance. This is especially true for staff education and training. This indicates that there is still room for improving human resource management by engineering consulting firms. It is observed by path analysis that, among the three dimensions of engineering consulting firms’ intellectual capital, the human capital has a great influence on structural capital and relational capital. However, only relational capital has a direct influence on business performance. Human capital has an influence upon the business performance via the relational capital.

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a b s t r a c tTaiwan is a nation densely concentrated with industrial properties, causing a high level of greenhouse gas emissions. Therefore, poor air quality and environmental pollution in Taiwan are severe societal problems. Although Taiwan has formulated severe environmental protection-related penalties, the excessive use of energy and high level of pollution remain a persisting environmental problem in Taiwan. Because communities are collective groups beneficial for the promotion of local policies, several subsidy policies for environmental quality improvement are currently promoted through community development in Taiwan. These policies consider factors such as Taiwan's long-day geographical environment and the increase in idle agricultural land after the process of economic transition. To explore the effectiveness of promoting these policies, this study applied the Delphi method and fuzzy logic theory to establish a quantified effectiveness assessment model. In addition, we determined that communities that encourage the participation of its residents and factors such as proenvironment, solar power, and plain afforestation enhanced the overall environmental protection of the community and reduced the emission of CO 2 . Furthermore, the core problems that hinder the improvement of current policies were identified.

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Industry and economy are developed to satisfy the needs and material desires of people. In addition to making high greenhouse gas emissions the responsibility of industry, individuals and families should also be held responsible for the production of greenhouse gas emissions. In this study, we applied the Delphi method, the analytical hierarchy process, utility theory, and fuzzy logic theory to establish an energy conservation assessment model for households. We also emphasize that subsidy policy makers should consider the social responsibility of households and individuals, as well as sustainability of energy conservation.