* Corresponding author: Sabrina Sacco email: sabrinasacco.s@libero.it Detritus / Volume 11 - 2020 / pages 92-102 https://doi.org/10.31025/2611-4135/2020.13974 © 2020 Cisa Publisher. Open access article under CC BY-NC-ND license PATRIMONIO PLÁSTICO: DECISION-MAKING PROCESS, FOR THE RE-USE OF AN INDUSTRIAL ARCHITECTURE IN MONTEVIDEO Sabrina Sacco * and Maria Cerreta Department of Architecture (DiARC), University of Naples Federico II, via Toledo 402, 80134 Naples, Italy Article Info: Received: 25 March 2020 Revised: 12 June 2020 Accepted: 24 June 2020 Available online: 23 July 2020 Keywords: Industrial heritage Life cycle assessment Multi-criteria analysis Circular economy SDGs ABSTRACT This project is based on a research carried out between the Departments of Architec- ture in University Federico II in Naples and University of the Republic in Montevideo. The research is focused on the idea of re-using as a solution to trigger synergetic mechanisms among different entities and identities of the urbanscape. The core el- ement of the study is Patrimonio Plástico, a decision-making process for the re-use of an industrial architecture, which deals with recycling waste and materials, such as plastic, containers, and abandoned spaces in the city. This multidisciplinary and multiscalar process translates into actions some targets of the Agenda 2030 SDGs, on a global scale, as well as the objectives expressed by different social groups at a local level, in order to identify the most suitable project, whose strategy has been assessed as economically, socially and environmentally sustainable. 1. INTRODUCTION Patrimonio Plástico is decision-making process de- signed into a suburban area of Montevideo that shifts from the idea of transforming the waste into resource, and that one of giving new meaning to artefacts and places whose value has been underestimated. The purpose of the research is to enhance the existing architectural heritage within a synergetic process that aims to convert the industrial building and the waste materials into a circular economy perpective. Circular economy has been defned by the Ellen MacAr- thur Foundation (2017; 2019), as an autopoietic economy that radically transforms the standard production system - based on a massive natural resources exploitation and the proft maximization - into a detailed revision of the entire chain involved in production. The re-use of waste from the several production cycles becomes a crucial issue to be achieved in terms of eco- nomical, social and environmental sustainability criteria, as it requires cooperation, sense of community and a wide enhancement of the existing. In this contribuition the concept of waste is expanded and the action of space recovery concerns a wide range of elements that can be divided into: • Abandoned or partially used industrial buildings loca- ted in areas that are subject to urban transformation; • Marginal communities against those ones living in the city centre; • Materials and objects considered "waste". The re-use of the industrial architecture in the city of Montevideo may lead to a way to implement the circular economy model, by dividing waste from environmental re- sources such as land use, energy and materials, and by cre- ating a shared social value (Porter & Kramer, 2006) thanks to its relationships with the social, cultural and economic history of the territory. At this point supporting strategies that identify in this architecture vital elements for future transformations and see in the re-use strategy an urban solution to new eco- nomic, cultural and social values, becomes priority. This contribution is organized as follows: the frst sec- tion is dedicated to an accurate narration of the strong bond between the Aguada District and its industrial her- itage, also mentioning the presentation of the industrial architecture as study subject; the second section pre- sents the decision-making process developed through a multi-methodological approach (Fusco Girard et al., 2004) that combines different multicriteria methods (Ishizaka, 2013), chosen according to a site-specifc selection, es- sential to identify the main stakeholders, whose projects and goals are expressed to make a comparison among the possible scenarios which can possible occur; the third section is dedicated to the results of this decision-making process and to an assessment of the economic, social and environmental sustainability of the scenario, able to mitigate the conficts among the various stakeholders.