環境績效評估為評鑑環境管理活動成效之工具,透過有效與嚴謹的程序,建立評估模式為執行ISO 14001環境管理系統之重要工作。然而回顧該領域之理論與實務相關文獻,我們發現針對環境績效評估系統建置過程之探討仍相當缺乏。因此本研究利用名目群體決策技術(Nominal Group Technique, NGT)進行該系統之建構,並配合以小群體集體參與之方式,發展一套整合「指標選取」、「指標評估」與「模型建置」之環境績效評估模式。為驗證本研究所提出系統建構方式之有效性,我們邀請28位環境管理專家進行實證研究。研究結果顯示,僅憑個人主觀意見所建置之環境績效評估系統與利用名目群體決策技術所建構之系統在指標總數為38的情況下,前者平均選取指標數為28,後者平均選取指標數為17,後者較前者平均選取指標數減少39.29 %,該結果所代表之涵義為本研究所提出的方法在簡化系統方面具有良好成效。並且根據統計檢定結果顯示,在績效指標數量顯著減少之後,並無損及系統之完整性、預防性、反映性及關連性等四項系統特性,因此對於未來在環境績效評估系統的建置,我們建議可以運用小群體決策技術提高其效能。有關上述研究結果所代表的涵義,在本文中有進一步闡述。
The environmental evaluation system is a tool to measure the performance of environmental management. To have the best practice of ISO 14001, building an effective performance evaluation system is crucial. However we found few scientific studies dealt with the way of developing such system. In this study, we use nominal group technique (NGT) to develop a systematic model. It is intended to integrate the phases of building a performance evaluation model, which includes indicator selection, indicator evaluation, and model building in a way of collective participation. To verify the effectiveness of this proposed model, we invited 28 experts to conduct an empirical study. The results indicate that there is significant difference between the model we proposed in this study and the model built by expert’s intuition. In particular, comparing to the intuitive model, we found the proposed model selected numbers of indicator average decreasing 39.29%. It’s obvious that the proposed model have the advantage of more parsimoniousness, at the same time, it still reserves the model characteristics such as completeness, prevention-focus, and responsiveness. Therefore, constructing the environmental performance evaluation system in terms of NGT can increase the system effectiveness. The implications of the research findings are further discussed in the following.