Indexing Sustainability: Defining, Measuring and Managing the Performance of Urban Development Joyce Hsiang and Bimal Mendis (joint first authors) School of Architecture, Yale University, New Haven, CT, USA email:
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[email protected] Daniel Markiewicz and Ryan Welch (joint second authors) School of Architecture, Yale University, New Haven, CT, USA email:
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[email protected] Key Words: sustainable development, urban planning, index, performance indicators, cartography Abstract Future urban development is positioned to critically overwhelm global resources. Despite the need for standards, a comprehensive and objective system for measuring and managing the sustainability of urban development does not exist. This article investigates how sustainable development is defined; how its performance can be measured through indexing and indicators; and how comparative and spatial indexing methods have the potential to change the way cities are designed. The first section examines the complex and reciprocal relationship between sustainability and urban development through a historic overview of its definition. Key issues, objectives and challenges related to defining sustainability are discussed for the purpose of helping establish general guidelines and principles of consideration when assigning value and assessing urban development. The second section analyzes and compares existing sustainability indexes and development indicators from multiple scales and sectors as a means of understanding how performance of development can be assessed and accounted for with objective quantifiable measures. Differences, strengths, and weaknesses are revealed through an analysis of index composition, scale and relative measures of existing systems. The final section suggests and describes two new strategies for indexing the sustainability of urban development: comparative indexing and spatial indexing.