過去對臺北區水源集水區的研究，多偏重於水質、環境和規劃方面，而實際上本區的開發問題已形成一公共問題，因此本文以公共政策的角度著手。政策制定的決策程序對公共政策而言是相當重要的，而本區開發之公共問題是因民衆抗議而起，若能邀請民衆參與決策程序，對公共問題的解決是有助益的。因此本文研究的目的，在獲得一個可操作，能貫徹民衆參與意義，且能得到較好決策品質的公共政策決策程序。針對民意的充分表達，本文提出幾種決策方法。決策方法係方案評比的工具，可以將民衆對方案的偏好呈現出來，以在政策中納入民意。針對決策品質的要求，本文提出回合結構的概念，在程序中將問題分成若干回合進行討論，每回合只比較少數的方案，而且上一回合的解決方案往往指引了下一回合的討論方向，決策品質自可提升。本文在得出回合結構的民衆參與決策程序後，將本程序應用於臺北區水源區的開發問題上，以陳述其操作的細節。

Previous studies on the development of Feei-Tsuey reservoir area were mainly conducted from the planning and water quality protecting point of view. However, since 1978, it has gradually become a public issue due to the conflicting objectives: water preservation and land development. Basicly, the above problem can be decomposed into a sequence of subproblems according to its multi-stage property. For the multi-stage type of public problem, this paper describes a decision making process which includes two important concepts: round structure and public participation. With the aid of decision tools, the values and interests of different groups of participants are interchanged, and an improved public policy will be obtained. The proposed process is then applied to the case of Feei-Tsuey reservoir development problem to illustrate the procedure in detail.