本案例研究是一个大型节水套件改造项目，涉及西北天然气公司和俄勒冈州波特兰水务局之间的合作关系。本文重点讨论了伙伴关系问题:挑战，以及作者如何解决这些问题；关于建立和管理公私伙伴关系的建议；与受监管的IOU（投资者拥有的公用事业）合作的建议；以及未来公私伙伴关系的水晶球视图。

This case study is a large-scale water conservation kit retrofit program involving a partnership between Northwest Natural Gas Company and the Portland Water Bureau in Oregon. This paper focuses on partnership issues: challenges, and how the authors resolved them; recommendations on establishing and managing a public/private partnership; advice on working with regulated IOUs (investor-owned utilities); and a crystal ball view of public/private partnerships of the future.