Épsilon

18

Authors: Diego Fernando Suero Pérez, Hugo Mercado Cervera, Helman Hernández Riaño3

Distribution, location and routing systems have significant impacts on a company’s competitiveness, particularly with regard to transportation and service costs. Therefore, designing strategies to minimize costs is a recommended alternative for organizations. This paper presents a suggested routing and location scheme for distribution centers based on the use of linear programming algorithms and Gillet and Miller’s heuristics for a company that produces olive oil and sells it in supermarket chains in Barranquilla, Colombia. The implemented techniques reveal, as a result, the location and dimensioning of a single distribution center in the downtown area and not several, as expected. A recommendable routing for each client is also proposed.

20

Authors: Carlos David Zuluaga Ríos, Andrés David Pinto Ríos, Alejandro Garcés Ruiz

Among renewables, wind power has become the source of greater participation at global level. One of the disadvantages of this clean energy are the fluctuations in power flows at the wind generation center outputs, due to the stochastic nature of the wind, which causes negative impacts that affect the reliability of power systems. One way to mitigate these fluctuations is to use flywheel energy storage systems (ESS). In the operating elements of ESS there are control modules responsible for regulating the active power delivered by wind farms, that is, the active power stabilizers. This study presents three types of stabilizers: the first one is based on the average power delivered by these generation centers and on the ESS power; the second one works through a reference power and the ESS power, and the third one uses a reference power and a proportional-integral (PI) controller to calculate the ESS power. After this energy is obtained, the rotational speed of the ESS is determined. In order to analyze the performance of power stabilizers, the average power and the standard deviation of the power delivered to the power system is calculated.

21

Authors: Wilson Alexánder Pinzón Rueda, Carlos Andrés Arango Londoño

The Toyota Production System (TPS) has been widely spread, due to its relative success in some contexts. Companies from a wide range, such as food, metalworking and industrial companies, have tried to implement the TPS; however, in reviewing the literature on the subject, the conditions for a sustained and consistent result during use are not identified. This article aims to present the relationship of different elements, such as poka yoke and justo a tiempo, with the TPS, and for that purpose we start from the idea of the perfect market as a necessary condition of the model. For this analysis, third order cybernetics are used

31

Authors: Diana Lancheros-Cuesta, Andrés David Mojica Ospina, Daniel Alberto Barbosa Vargas

There are currently different information systems that can predict behavior from large sets of data and which allow decision-making in companies; however, these tools are difficult to acquire due to their complexity and robustness, as well as high costs or legal restrictions. Information management in companies becomes a priority activity, because good management in data handling improves processes. Accordingly, this paper shows the development of a software based on data mining techniques, thus enabling the collection and storage of information in order to analyze hidden behavior patterns in a company’s inventory department.