Search

There are entities that provide on-site services, where the exchange of value occurs in the client's facilities, involving a greater number of resources. In the work, two entities are presented, an offer "turnkey" security system, executing projection, supplies, installation and commissioning, training the client and the subsequent maintenance service of the systems, the other distributes ice cream to different points of sale. In both entities the clients are classified considering only one criterion (installed technology and distance). Both entities have presented problems with the performance indicators, being necessary the redesign of their planning systems. The first step that is proposed for the conformation of the plan is to carry out the integral classification of the clients taking into account a set of criteria. It is showned how to obtain this classification using a multicriterial approach, specifically the Scoring method, which allowed to quickly and efficiently determine the integral classification of clients in the entities under study. Among the economic results can be mentioned: a saving in 11 760 liters of oil per year, which results in a savings of $ 5 576, 64 USD for a turnkey service entity, while for the ice cream distribution entity increases the income at $ 35,347, the utility at $ 40,588.45 and the cost decreases at $ 5,470 for one month of application of the procedure. [ABSTRACT FROM AUTHOR]

In this paper we show the results achieved by integrating Six Sigma, discrete simulation techniques and multi-criteria techniques for improving a beauty service that desires to obtain the best compromise solution between incomes, costs, use of resources and customer satisfaction. DMAIC methodology was used to propose a procedure that defines, for each phase, simulation tools, multi-attribute decision making, statistics and quality control and management. The use of simulation allowed us to analyze the different actions for improvements and determine the values of the variables of interest being defined by the administrative group. We used, between multi-criteria techniques, PRES index for ranking the actions according to experts' preferences. [ABSTRACT FROM AUTHOR]

Waste Electrical and Electronic Equipment (WEEE) became an important environmental issue due to the constant technological evolution. Waste plastic is one of the main polluters and to recycle, it is necessary a separation step. Plastic recycling is important to the plastic industry and for energy savings. There are many kinds of plastics in extensive use at the present time and the most common in the electronic industry are the acrylonitrilebutadiene- styrene (ABS) and high impact polystyrene (HIPS). These plastics are difficult to separate because they have similar specific weights and both are repellent to water. Froth flotation may become possible by the proper use of selective wetting agents. Our experimental work tried to use ethanol to depress the plastics and was conducted in a glass cell. The floated plastics were mechanically removed and no additional frother was required. The process with 20% weight of ethanol was able to produce a concentrate of HIPS with at least of 93% purity and ABS with 99% purity. [ABSTRACT FROM AUTHOR]