Music - a Multi-Scalar Index for Evaluating Sustainability in Cities
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Sustainable Architecture and Urban Development 19 MuSIC - A Multi-scalar Index for Evaluating Sustainability in Cities Luca D'Acci and Patrizia Lombardi Politecnico di Torino, DICAS - Department 0/Housing and City Abstract It is intemationally recognized that Sustainable development is achallenging multi-stake holders process, encompassing multiple dimensions and trans disciplinary knowledge. The idea of sustainability dates back more than 30 years. Over these decades, govemments, communities and businesses have all responded to the challenge of sustainability to some extent. Citizens in alm ost all countries not only know the issues, but tend to feel that the quality of the environment is important both to their own wellbeing and to the common good. Despite all these efforts, when the Millennium Ecosystem Assessment (2005) released the results of a four-year global study into the state of global ecosystem services and the possible consequences of anticipated ecosystem change on human wellbeing, the board feit it necessary to present the following waming: ... the results of human activity are putting such astrain on the natural functions of Earth that the ability of the planet's ecosystems to sustain future generations can no longer be taken for granted. According to Adams (2006), one of the reasons is the problem of metrics as a result of the desire to set targets and measure progress. Using indicators as a means for measuring or assessing the sustainability of cities and practices intended to improve sustainability is criticized for several reasons. One of the main concems is the way in which indicators are developed through often "ad hoc" processes without a structured framework or consensus on what urban sustainability is, a consensus which is still more of a political than a scientific enterprise. Most present indicators have been developed by govemments and intergovemmental bodies in response to their needs. This ensures policy relevance, but often fails to capture what is going on at the grass roots of society. Other indicators have been created by CSOs or academics to draw attention to policy issues. Few indicators have been devised by or are designed for the real 20 Luca D'Acci & Patrizia Lombardi agents of change businesses and individuals operating at a decentralized level in aB societies. Most critical, many of the indicators, even the much-used statistics relies on assumptions that when we draw our conc\usions. This study presents the work wh ich has been done toward the development of a new index to measure the sustainability of eities having the following characteristics: complementary - displaying multi-scalar reeiprocity and transferable - comparable across spatial scales and stakeholder interest. This index wishes also to address the question of how to overcome the gap between awareness of the issues at stake and the concrete engagement in sustainability-driven action, as individuals and as a soeiety. Keywords: sustainable development indicators, built environment, evaluation 1 Introdudion "At the heart of the sustainable development agenda is the question of management" (Brandon and Lombardi, 2005: 144). The most difficult chaUenge facing policymakers is deciding the future directions of society and the economy in the face of conflicting demands of short-term political favour, economic development, social progress, and environmental sustainability. Wrong deeisions can lead to critical consequences, increase human suffering, and precipitate current environmental and economic crises. Improving the basis for sound decision-making is, therefore, a high priority. The requirement to evaluate whether a development is sustainable was already recognized in Agenda 21, which observed that "indicators of sustainable development need to be developed to provide solid bases for decision-making at an levels". As a result, the last twenty years have seen a overabundance of measures, indicators and evaluations which attempt to make some assessment of what is happening to our planet and the actions of human beings upon it. However, the development of indicators has resulted in considerable complexity, which has made it difficult to derive suitable assessment criteria. Notions of weak and strong sustainable development have been debated in the literature, and a number of indicators or frameworks have been proposed to capture them. For weak sustainability, efforts have focused on whether the well known macroeconomic indicators of gross national product and gross domestic product can be transformed to produce an indicator of sustainable development. For strong sustainability, the concept of critical natural capital was introduccd for the stocks of capital that cannot be substituted by other stocks of environmental or other capital to perform the same functions (Ekins et al., 2003). Sustainable Architecture and Urban Development 21 Sustainability indicators should be able to measure the essential characteristics of the system and show a scientifically verifiable trajeetory of maintenance or improvement in system funetions. Unfortunately, like models, indieators reflect reality imperfectly. Within the measurable, the quality of indicators is determined largely by the way reality is translated into measures and data, be they quantitative or qualitative. Although present scientifie knowledge is inadequate to understand many aspeets of human-environment interaetions, and some feedback loops between human and environmental systems are irreducibly complex, many issues are sufficiently weIl understood to necessitate seientifieally aecurate indieators. The quality of indieators inevitably depends on the underlying data that are used to compose them. The prevailing data gaps in monitoring of human-environment interactions and the poor quality of many databases are potential threats to the quality of the related indieators. Many indicator sets have been assembled; countries have started their own indieator programs at the national level, since the Rio Earth Summit in 1992 adopted Agenda 21 and launched an international indicator process. Methods are gradually becoming standardized and poliey decisions inereasingly provide clear directions and targets. However, major conceptual ehallenges remain, methods need further development, and more must be learned about the most effective ways to influence policy. We are still far from fully integrated sets of indicators or indices to support self-regulating sustainability. The eomplexity of the problem makes a complete and intemationally accepted measure impossible (Brandon and Lombardi, 2005). The aim of this paper is to critically analysis major shortcomings of eurrent metrics and to introduce a new index which seems to be able to overeome some ofthe identified limitations. 2 A critical Analysis of Current lndicators and Indices Indicators are symbolic representations designed to communicate a property or trend in a complex system or entity. They are, by definition, eommunication tools (EEA, 2007) that: Simplify complex issues making them accessible to a wider audience (i.e. non-experts), • Can encourage decision-making by pointing to clear steps in the causal chain where it can be broken, Inform and empower policymakers and laypeople by creating a means for the measurement of progress in tackling environmental progress. It is the capaeity of the indicator to reach its target audience that determines its success. Failure to communicate makes the indieator worthless. However, beeause sustainable development is a multi-stakeholder process, indicators must communicate to a variety of different actors. 22 Luca D'Acci & Patrizia Lombardi Indicators are distinguished from raw data and statistics in that they contain reference values such as benchmarks, thresholds, baselines, and targets. Such values have the most important function to transform meaningless data into information. Several basic types of indicators or indices may be distinguished by their methods of construction and level of aggregation, as folIows: Indicator: Ihis type of indicators includes results from the processing and interpretation of primary data. Examples include C02 emissions, employment rates, etc .. Aggregated indicator: This type of indicators combines, by an additive aggregation method, a number of sub-indicators that are defined in the same or similar units, e.g. tones, monetary units, etc .. Examples include the domestic material consumption, the Gross Domestic Product (GDP), the Adjusted Net Saving and the Genuine Progress Indicator (GPI), developed by the World Bank. Composite indicator or Index: This type of indicators combines various aspects of a given phenomenon that are based on the complex concept into a single number with a common unit. Examples include the Ecological Footprint, the Human Development Index (HOl), Environmental Sustainability Index (ESI); the Environmental Performance Index (EPI), the Urban Govemance Index (UGI). To be effective, indicators must be credible (and/or scientifically valid), legitimate in the eyes of users and stakeholders, and salient or relevant to decision-makers. More specifically, the quality of an indicator can be judged on five methodological dimensions: purpose and appropriateness in scale and accuracy, measurability, representation ofthe phenomenon concemed, reliability and feasibility, and communicability to the target audience. There is seldom a perfeet indicator, so the design generally involves some methodological trade offs between technical feasibility, societal