異質採購是最有利標採購方法的重要基礎,然而過去卻一直缺乏一套量化分析理論,致使採購人員在選擇決標模式時缺乏客觀依據而易產生爭議。本文以經濟學之效用函數為基礎,參酌文獻中有關效能與價格關係以及價格彈性等理論,建構一套結合價格(Price)與效能(Performance)之異質採購分析方法,稱為「價格效能分析模式(P/PAM)」,以建立機關異質採購決標模式之理論分析基礎。本文除建立P/PAM之數學模式外,並提出以「市場效能彈性(Em)」做為判斷異質採購的衡量指標,最後以營建專案常見之財物採購及統包工程採購為例 Heterogeneity of procurement is essential for Best Value (BV) tender selection. However, there was no theoretical model developed for analysis of the heterogeneity of tenders. It has caused difficulties for the procurement personnel of public agencies in