本powerpoint演示文稿概述了绩效指标的背景信息，并介绍了国际水协会（IWA）绩效指标（PI）计划。涵盖的主题包括:战略方针；结构——数据元素、变量、驱动因素、背景信息；信心评分；以及Sigma Lite 2.0。

This powerpoint presentation outlines background information on performance indicators and presents the International Water Association (IWA) Performance Indication (PI) Program. Topics covered include: the strategic approach; structure - data elements, variables, driving factors, context information; confidence grading; and, Sigma Lite 2.0.