Paper Title
A Look at Complexity in Projects: Rethinking for Circularity in Supply Chains

Abstract
The circular economy activities today are increasingly important in societies, promoting sustainable consumption and stimulating organizations to close their production cycles, in such a way that there is a transformation of a linear economy where processes are culminated with the elimination of waste, to a circular economy that is regenerative and restorative from the design. This is not an easy task, therefore it requires a commitment from the leaders of the companies who must structure different projects that are often characterized by their complexity[1]. The objective of this study is to know if there is a relationship between the variables of complex projects with the variables of circular economy. A survey-type instrument was applied to a non-probabilistic sample of 36 companies in the Colombian food industry to evaluate the study variables. A principal component analysis and a bivariate and multivariate parametric analysis were carried out to test their relationships. The results showed that the variables Ambiguity, Human behaviors, time, and cost positively affected the circular economy variables such as green purchases and recycling, while the other circular economy variables did not present a significant effect. However, a contradictory relationship was observed between the behavior of the system and the circular networks. The results suggest that, although companies in the food industry may be willing to adopt sustainable consumption because they consider it important to work for the environment when considering green purchasing and recycling, there is still a contradictory impact between connectivity, dependency and dynamic systems of the organizations regarding the link with circular clusters. It is necessary to establish action plans for this in order to better embrace circularity in organizations and in this way not only economic benefits but also social and environmental benefits that are aligned with sustainable development can be obtained. Keywords - Circular Economy, Supply Chain Management, Complexity, Sustainability.