The market opening and the globalization of supply chains, demand a structural changes in which logistics has a strategic role. Nowadays, clients evaluate product quality, its value added and its availability in time and form, which implies a need to make the process efficient. Several experts have proposed some logistics management models to increase competitiveness in the market, but some of these models are too ambitious for small and medium sized enterprises (SMEs) due to their informal structure and their lack of technical knowledge; other models make indirect reference to the internal information flows, which include whole system disintegration because of the weak interrelation among the different areas. In Mexico, SMEs represent 4.2%, they generate 31.5% of employment and provide 37% of the gross domestic product; that is why it is important to reinforce their competitive position in the market. This research presents the design of a conceptual model of logistic management for SMEs which could provide comprehensive solution through control of the variables involved in the logistics process; to verify that the variables considered in each identified dimension are correct factor analysis was used.

Management of tire waste is an important aspect of sustainable development due to its environmental, economical and social impacts. Key aspects of Reverse Logistics (RL) and Green Logistics (GL), such as recycling, re-manufacturing and reusable packaging, can improve the management of tire waste and support sustainability. Although these processes have been performed with a high degree of efficiency in other countries such as Japan, Spain and Germany, the application in Mexico and Russia has faced setbacks due to the absence of guidelines regarding legislation, RL processes, and social responsibility. Within this context, the present work aims to develop an integrated RL model to improve on these processes by considering the RL models from Russia and Mexico. For this, a review focused on RL in Mexico, Russia, Japan and the European Union (EU) was performed. Hence, the integrated model considers regulations and policies performed in each country to assign responsibilities regarding RL processes for the management of tire waste. As discussed, the implementation of efficient RL processes for the management of tire waste depends of different social entities such as the user (customer), private and public companies, and manufacturing and state-of-the-art approaches to transform waste into different products (diversification) to consider the RL scheme as a total economic system.

Se realizó un análisis descriptivo de tres fuentes de información con datos sobre accidentes de tránsito, lesiones de causa externa y enfermedades ocupacionales ocurridas durante el periodo 2011-2015 a los conductores del autotransporte de carga de México. Se encontró que los trabajadores del tránsito terrestre tienen mayor riesgo de muerte por accidentes (Rate Ratio [RR] = 4.84, Intervalos de Confianza [IC] 95% [4.48, 5.23]) y por enfermedades laborales (RR = 1.53, IC 95% [1.46, 1.61]), que el total de trabajadores en México. Las principales causas de invalidez en los conductores de vehículos pesados se relaciona con desórdenes musculo-esqueléticos o reconocen la obesidad como uno de sus factores de riesgo (14% y 40%, respectivamente), además de que los vehículos de mayor tamaño son los que tienen el mayor riesgo de muerte por accidentes de tránsito (RR = 3.42, IC 95% [3.19, 3.65]). Por lo que conducir vehículos de carga es una de las actividades más peligrosas en cuanto a padecimientos y factores de riesgos asociados a su ocupación.

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Nowadays, inventory management is a tool that must be extended to cover all aspects of the supply chain (SC). One of these aspects is Sustainable Development (SD) which emphasizes the balance between economic well-being, natural resources, and society. As inventory involves the use of natural and economic resources, the integration of SD criteria is important for a more efficient and sustainable SC. In this work, the most important SD variables associated with inventory management were identified. These variables were integrated as cost elements within a nondeterministic inventory control model to include SD criteria within inventory supply strategies. Through the assessment of the proposed integrated model, it was determined that, although SD practices involve additional investments, specific practices such as reuse/recycling and government incentives can increase revenue and profits. This is important for the development of government and business strategies to perform sustainable practices.