The Urban Measurement report summarises research undertaken by Arup on practices, drivers, challenges and frameworks related to urban measurement, and assess how these approaches could inform the development of the CRI. As the CRI was initially aimed at developing an index, the report specifically explores how indices are used by different frameworks and the merits, challenges and utility of creating an index. The report is based on a review of 11 documents on the use of indicators and 24 different indicator frameworks.