ABSTRACT
The current crisis (triggered by the COVID 19 pandemic) is an opportunity to make a profound and systemic change towards a more sustainable economy that works for both people and the planet. It is about decoupling economic growth from environmental degradation, increasing resource efficiency and promoting sustainable lifestyles. The Design for Sustainability (D4S) concept describes methodologies for making sustainable (social, economic and environmental) improvements to products by applying elements of life cycle thinking. It is intended to go beyond the environmental optimization of products and reduce environmental impacts while maintaining an acceptable quality of service. This paper explores the characteristics that the databases or surveys used to link the properties of a certain product or service with the sensations of the users must have. The necessary size will be analyzed in terms of properties and levels of the product, emotions produced and number of respondents;putting it in relation to the data analysis and processing techniques that will be used in later phases. © 2022 by the authors. Licensee AEIPRO, Spain.