The use of 3D printing is more common in industries, such as textiles, food, aeronautics, automotive, medicine and others, because of its great versatility during the manufacturing process generation of elements or components with high geometric complexity in relatively short time at low cost. This study presents the characterisation of semi-rigid acrylonitrile-butadiene-styrene (ABS) and polylactic acid (PLA), which was obtained using both of additive manufacturing and specifically the molten material deposition method. The semi-rigid samples were made with five different infill patterns in their interiors: triangle, square, pentagon, and circles. The samples were subjected to tensile and bending tests, which allowed the evaluation of the yield strength, ultimate tensile strength, deformation and modulus of elasticity. Also, ASTM D638-14 and ASTM D790-10 norms were used for methodology validation. The results determined that the distribution of concentric circles with 7,964 MPa/g and 12,234 MPa/g was the best for PLA and the square with 8.82 MPa/g and 8,994 MPa/g was the best for ABS respectively.

Considering that global awareness for sustainable development has risen to face environmental damages, different building materials have been considered from a mechanical perspective. In this sense, considering the richness of South America regarding its woods, the Guayacan and the Ecuadorian oak timbers have not been previously characterized. The present research has performed mechanical, thermal, and moisture content characterizations to acknowledge the benefits of considering these materials for the building industries. In this sense, Guayacan has been shown to have lower thermal conductivity, making it ideal for thermal insulation; the oak from Manabi showed the best compressive strength; while the oak from El Oro stands with the best tensile strength; and the oak from Loja showed the best modulus of elasticity. On the other hand, all the materials were compared by multicriteria decision methods to select the best, by using the COPRAS method driven by the objective entropy-weighted method, showing that the oak from Loja is the best choice considering the advantage that presents with the modulus of elasticity. In this sense, it is concluded that regarding the mechanical properties, there is not much difference for the compression, bending, and tensile strength; nevertheless, for the modulus of elasticity the oak from Loja stands out, making it a factor to be considered in the selection of a wood for building applications that is corroborated through multicriteria decision methods.

This document reflects an analysis on the evolution of industrial design and agile methodologies, in order to identify their main characteristics and find those points in common that allow to conclude on the applicability of these methodologies, initially created for software development. , in a process as important as that of industrial design. According to what has been explored, and considering the values that agile methodologies support since their creation in 2001, it is determined that they can guide the design process to a functional, sustainable, useful, aesthetic, economic and formal result, creating a fundamental basis for a specific review of the methodologies that best apply and how to implement them within the field of industrial design. Keywords: Agile Methodologies, Industrial Design, Agile. References [1]J. S. Rial Huerta, «Aplicación de Metodologías Ágiles a Desarrollo de Proyectos,» Sevilla, España, 2019. [2]A. Bramanti, «Estrategias de Innovación en los Procesos Productivos y su Relación con el Diseño Industrial,» 2020. [3]L. De Caicedo, «Diseño Industrial,» Coyontura Económica , vol. 10, nº 4, pp. 141-153, 1980. [4]A. Gay y L. Samar , El diseño industrial en la historia (reimpr.), Ediciones Tec, 2007. [5]G. Vasquez Cabo y C. Amiama Ares, «Métodos ágiles en gestión de proyectos. Aplicación a la explotación y conservación de infraestructuras varias.,» Creative Commons, p. 13, 2018. [6]F. Arroyo y D. Bravo, «El Proceso del Diseño Industrial como Herramienta de la Gestión de la Empresa,» INGENIO, vol. 3, nº 1, pp. 71-83, 2020. [7]C. Riba Romeva, Diseño concurrente, Primera edición: abril 2002 ed., Barcelona, 2002: Ediciones UPC, 2002, p. 226. [8]E. Uribe y L. Ayala, «Del manifiesto ágil sus valores y principios.,» Scientia et technica, vol. 13, nº 34, pp. 381-386, 2007. [9]P. Rodríguez y D. Agustín, «Adopción de metodologías ágiles: un estudio comparativo entre España y Europa,» Revista Española de Innovación, Calidad e Ingeniería del Software, vol. 6, nº 4, pp. 6-28, 2010. [10]D. Cárdenas y P. Quintana, «Aplicabilidad de metodologías ágiles en proyectos competitivos de la industria plástica,» Revista Investigación en Desarrollo y Gerencia Integral de Proyectos, vol. 3, nº 3, pp. 41-63, 2020. [11]M. Gutiérrez, C. Pérez de Celis y G. Cossío , «Aplicación de las metodologías ágiles en el proceso de producción de piezas de arte de nuevos medios: Bio-lenciacomo caso de estudio,» Journal of Information Systems and Technology Management, vol. 8, nº 2, pp. 407-424, 2011. [12]D. Moher, A. Liberati, J. Tetzlaff y D. Altman, «Preferred Reporting Items for Systematic Reviews and Meta-Analyses: the PRISMA statement,» PLoS Medicine , vol. 8, nº 7716, pp. 336-341, 2009.

This paper contains the tension analysis of a new composite material based on a mixture of polyester resin reinforced by vegetal fiber, and its comparison with the pure polyester resin tension resistance. The analysis was made on mixtures with fiber weight percent of 5, 12, 15, and 20; the specimens were built using a cold compress process; and ASTM standard test methods were used for analysis.