Synthesis of main criteria, methods and issues of multicriteria supplier selection

O objetivo do presente artigo é identificar na literatura quais são os principais critérios considerados no processo de decisão, os principais métodos individuais e combinados e os subproblemas da seleção de fornecedores no contexto multicritério. Cabe ressaltar que as tarefas de avaliar e identificar os melhores fornecedores para um novo produto ou serviço são essenciais ao gerenciamento da cadeia de suprimentos (GCS). Para executá-las apropriadamente, considerando-se a natureza multicritério da seleção de fornecedores, torna-se necessária a inclusão de uma abordagem de agregação dos critérios, cuja escolha depende basicamente dos objetivos da decisão, tipos de critérios a serem utilizados e racionalidade do decisor. Para atingir o objetivo proposto, optou-se por utilizar o procedimento da revisão sistemática da literatura que segue o protocolo proposto por Cronin, Ryan e Coughlan (2008), abrangendo artigos publicados nas bases ISI Web of Knowledge e Scopus, no período de 2001 a 2012. Além de sintetizar o conhecimento acerca do tema, o artigo ressalta os principais critérios, métodos e subproblemas da seleção de fornecedores, com isso, contribui ao identificar os aspectos que devem ser desenvolvidos em estudos futuros e ao apresentar aos gestores abordagens existentes para a tomada de decisões relativa à seleção de fornecedores de forma sistematizada.The purpose of this paper is to identify the main criteria considered in supplier selection, the main methods used and sub-problems in a multicriteria context. The tasks of identifying the best suppliers of new products or services or even for evaluating the performance of an existing supplier is essential to supply chain management (SCM). In order to perform these tasks properly, and considering the multicriteria nature of supplier selection, it is necessary to include an approach using aggregation of criteria, primarily chosen depending on the objectives of the decision, types of criteria to be used and the rationality of the decision maker. In order to achieve this objective this research used a systematic literature review of articles published in ISI Web of Knowledge and Scopus for the period 2001-2012 following the protocol proposed by Cronin, Ryan and Coughlan (2008). In addition to synthesizing knowledge about the subject, the article highlights the key criteria, methods and sub-problems of selection of suppliers, contributing by identifying the aspects that should be developed in future studies. It also provides managers with existing approaches to making decisions about supplier selection in a systematic way

Histologic and histomorphometric analysis of bone regeneration with bovine grafting material after 24 months of healing. A case report

Anorganic bovine bone mineral matrix (ABBMM) has been reported to have osteoconductive properties and no inflammatory or adverse responses when used as grafting material in sinus augmentation procedures. However, controversy remains in regard to degradation rate of ABBMM. The aim of this study was to histologically and histomorphometrically evaluate the degradation of ABBMM in human bone samples obtained in one patient 24 months after sinus augmentation. Materials and Methods: The histologic and histomorphometric analysis was performed by means of light microscopy in three specimens harvested from the same patient, Results: After 24 months the tissue pattern appeared to be composed of residual particles, some in close contact with the newly formed bone, others separated by translucent areas and osteoid tissues. Newly-formed bone presented different levels of maturation and numerous osteocytes, with greater numbers in bone closer to the grafted particles (27.3% vs. 11.2%, p < 0.05). The histomorphometric analysis showed mean values of 40.84% newly-formed bone, 33.58% residual graft material, 23.84% marrow spaces, and 1.69% osteoid tissue, Conclusions: Even though ABBMM underwent considerable resorption, a great amount of residual grafting material was still present after two years of healing following sinus augmentation. This study confirms that the bovine grafts can be classified as long-term degradation materials

AUTOMATION OF SYSTEMS AND EFFICIENCY OF SOME CONTROLLERS IN THE TEMPERATURE CONTROL WITH OSCILLATIONS IN THE TEMPERATURE OF ENTRANCE

One of the advantages of automating systems is the ability to remotely monitor where users can make changes to key system variables. The difficulty in assembling control systems is the successful integration of the units involved. All devices are integrated into a central control unit and based on theircommunication protocols, a general supervision and data acquisition control system is developed. In order to allow remote operation and monitoring of the system a friendly environment was proposed together with the analysis of the control architecture and integrated infrastructure, an algorithm wasdeveloped for the efficient operation of the system. For an effective sterilization of liquid foods, elevated temperatures are used for a shorter time. The system is closed-loop with variations in the product's inlet temperature. The PID / feedback controller consisted of imposing oscillations on the manipulated variable and the values of Kc and the critical period were obtained from tests, with a low gain value this system presented a low offset.The PID / feedback / feedforward consists of specifying the parameters Tc, ti, td and the gain Kff that is made through reaction curves obtained after changes in the input parameters. This controller kept the temperature within the desired safety range. The fuzzy / PID consisting of fuzzy controller gainbased on linear PID, three parameters were tested - proportional, integral and derived gain. This controller proved to be unsatisfactory, since the temperature oscillations were high

Logística Reversa: Desafios e Oportunidades no Brasil e no Mundo

Apesar da sua vital importância para uma gestão mais sustentável, o tema logística reversa, eixo central do dossiê deste segundo número da ReGIS, é ainda uma recente área de pesquisa. O assunto começou a ser formalmente estudado na Europa e Estados Unidos no final da década de 70. No Brasil, a logística reversa só alcançou maior visibilidade no final da década de 90

Logística Reversa no Brasil: Avanços e Perspectivas - Entrevista com o Professor Paulo Roberto Leite

O professor Paulo Roberto Leite é pioneiro no estudo e pesquisa da Logística Reversa no Brasil. Seu livro intitulado “Logística Reversa ”“ Meio Ambiente e Competitividade” foi o primeiro publicado no Brasil e na América Latina, no ano de 2003, e auxiliou na disseminação do assunto no País, motivando o ensino e a pesquisa na área. Por isso, para entender os avanços e as perspectivas sobre este complexo tema, torna-se imprescindível conhecer sua opinião

Histologic evaluation of bone healing of adjacent alveolar sockets grafted with bovine- and porcine-derived bone: a comparative case report in humans

To evaluate and compare histomorphometrically the bone response to two xenografts, one bovine and the other porcine, grafted in adjacent extraction sockets in a human. In this case report, two adjacent maxillary premolars were extracted, and the sockets were filled with two different xenogeneic bone substitutes (first premolar with bovine bone, and second premolar with porcine bone) to counteract post-extraction volume loss. Following 6 months bone core specimens were harvested during the placement of implants at the regenerated sites. Histomorphometrically, for the bovine xenograft the percentage of newly formed bone (osteoid) was 26.85%, the percentage of the residual graft material was 17.2% and the percentage of connective tissue 48.73%, while for the porcine xenograft, newly formed bone (osteoid) represented 32.19%, residual graft material was 6.57% and non-mineralized connective tissue was 52.99%. Histological results indicated that both biomaterials assessed in this study as grafts for socket preservation technique are biocompatible and osteoconductive. Bovine bone derived demonstrated to be less resorbable than porcine bone derived. Both xenogenic biomaterials did not interfere with the normal bone reparative processe

Hacia la evaluación de los procesos de interactividad del Dispositivo Hipermedial Dinámico “Telares de la Memoria”

El artículo aborda una problemática clave de Investigación y Desarrollo que se estudia en el marco del Programa interdisciplinario “Dispositivos Hipermediales Dinámicos”, referida al seguimiento y evaluación de los procesos de interactividad observables en redes sociales con fines educativos, investigativos y/o de producción, mediatizadas a través de entornos web colaborativos. Luego de presentar el marco teórico y metodológico del Dispositivo Hipermedial Dinámico (DHD) y fundamentar el concepto de “Interactividad-DHD”, se exponen características de un desarrollo de software original denominado “SEPI-DHD” y su aplicación inicial al análisis de los procesos de interactividad virtual de “Telares de la Memoria”. El mencionado caso, que trata sobre la escritura abierta y colaborativa de la memoria colectiva plural, se desarrolla desde el 2010 en la comuna de Wheelwright (Santa Fe, Argentina) y promueve la apropiación activa del patrimonio cultural. Dicha experiencia físico-virtual, se concibe en su diseño, desarrollo e implementación como un proceso de aprendizaje emergente hacia la producción de “civitas”. Sobre lo realizado se concluye que, la utilización de “SEPI-DHD”, aporta datos cuali-cuantitativos válidos para efectuar una evaluación más integral de los procesos de interactividad del DHD “Telares de la Memoria” en función del sostenimiento de su crecimiento escalar y sustentabilidad participativa.IRICE, CONICET - UN

Productive Agglomerations of Suppliers in the Automotive Industry: A Way to Maximize Competitiveness in Supply Chain Management.

The objective of this paper is to identify how the automotive industries maximize the competitiveness in supply chain management through the constitution of entrepreneurial productive agglomerations of suppliers. For this purpose, an applied research was carried out, and the technical procedure utilized was bibliographic review based in some researches about Brazilian industrial condominiums. Thus, through the constitution of entrepreneurial agglomerations of suppliers in automotive industry it is possible to obtain logistic advantages in the transporting, stocking and warehousing activities. Besides, it is possible to maximize the supply chain management competitiveness through the establishment of trust and lasting relationships between the components of the whole chain.El objetivo del siguiente trabajo es identificar como las industrias automotoras maximizan su competitividad en el manejo de de la cadena de proveedores a través de la constitución de aglomeración emprendedora productiva de los proveedores. Para éste propósito, se realizó una investigación aplicada, y el procedimiento técnico empleado consistió en una revisión bibliográfica de investigaciones acerca del condominio industrial Brasilero. Así, a través de la constitución de aglomeración emprendedora productiva de los proveedores es posible de obtener ventajas logísticas en las actividades de transporte y almacenamiento. Además, es posible de maximizar la competitividad de la gestión de la cadena de proveedores a través del establecimiento de relaciones de confianza entre los componentes de la cadenaThe objective of this paper is to identify how the automotive industries maximize the competitiveness in supply chain management through the constitution of entrepreneurial productive agglomerations of suppliers. For this purpose, an applied research was carried out, and the technical procedure utilized was bibliographic review based in some researches about Brazilian industrial condominiums. Thus, through the constitution of entrepreneurial agglomerations of suppliers in automotive industry it is possible to obtain logistic advantages in the transporting, stocking and warehousing activities. Besides, it is possible to maximize the supply chain management competitiveness through the establishment of trust and lasting relationships between the components of the whole chain

ANÁLISE DA VIABILIDADE DO PROCESSO DE PRODUÇÃO DE METANOL A PARTIR DA QUEIMA IN SITU DE CARVÃO MINERAL

Este estudo refere-se ao projeto de um processo para produção de metanol a partir do gás síntese (H2 e CO) obtidos pela queima in situ de carvão mineral com injeção de vapor de água. O processo tem como equipamentos um reator que trabalha sob pressão e um separador líquido-gás. Como existe a presença de um gás inerte (CH3), para que não haja saturação deste no meio e não prejudique a reação foi considerado um by-pass, que descarta o inerte juntamente com parte dos reagentes. O projeto com reciclo mostrou-se um ótimo investimento, apesar da baixa conversão de reação, cerca de 18 %, o volume de produto obtido com base no custo da matéria prima utilizada foi satisfatório, pois o valor de compra do carvão mineral é baixo enquanto o valor comercial do metanol é bastante atraente, o que o torna altamente rentável com payback de 10 meses. Já o modelo que foi analisado sem o reciclo mostrou-se inviável, pois a quantidade de reagente que acaba sendo jogado fora é alta, já que todo reagente que não foi consumido será descartado. A taxa de retorno do investimento ficou relativamente baixa, e seu payback 58 meses, algo que o torna pouco atrativo aos olhos do investidor.Palavras-chave: Metanol; Reciclo; Carvão

Temas Emergentes em Administração

Apresentação Dossiê ReGIS 2018, Vol.4 n.