Evaluation of Pull Production Control Strategies Under Uncertainty: An Integrated Fuzzy Ahp-Topsis Approach

Purpose: Just-In-Time (JIT) production has continuously been considered by industrial practitioners and researchers as a leading strategy for the yet popular Lean production. Pull Production Control Policies (PPCPs) are the major enablers of JIT that locally control the level of inventory by authorizing the production in each station. Aiming to improve the PPCPs, three authorization mechanisms: Kanban, constant-work-in-process (ConWIP), and a hybrid system, are evaluated by considering uncertainty. Design/methodology/approach: Multi-Criteria Decision Making (MCDM) methods are successful in evaluating alternatives with respect to several objectives. The proposed approach of this study applies the fuzzy set theory together with an integrated Analytical Hierarchy Process (AHP) and a Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) method. Findings: The study finds that hybrid Kanban-ConWIP pull production control policies have a better performance in controlling the studied multi-layer multi-stage manufacturing and assembly system. Practical implications: To examine the approach a real case from automobile electro-mechanical part production industry is studied. The production system consists of multiple levels of manufacturing, feeding a multi-stage assembly line with stochastic processing times to satisfy the changing demand. Originality/value: This study proposes the integrated Kanban-ConWIP hybrid pull control policies and implements several alternatives on a multi-stage and multi-layer manufacturing and assembly production system. An integrated Fuzzy AHP TOPSIS method is developed to evaluate the alternatives with respect to several JIT criteriaPeer Reviewe

Sistema de información web para el control y gestión de pacientes del centro nacional de oftalmología CENAO

Presenta el desarrollo de un sistema web para el control y gestión de pacientes del Centro Nacional de Oftalmología CENAO para un mejor control de la información. Se diseña el sistema de información web utilizando la metodología UWE, según el patrón de arquitectura de software MVC

Capacitación, supervisión y evaluación del desempeño de la fuerza de ventas para la formulación de un plan de ventas efectivo

El presente informe de investigación bibliográfico tiene como tema ventas y como subtema capacitación, supervisión y evaluación del desempeño de la fuerza de ventas para la formulación de un plan de ventas efectivo. Como objetivo general se pretende determinar la capacitación, supervisión y evaluación del desempeño de la fuerza de ventas para la formulación de un plan de ventas efectivo. La teoría de la investigación esta presentada y dividida en cuatro capítulos: capitulo uno: dirección de la fuerza de ventas, capitulo dos: capacitación para las ventas: objetivos, técnicas y evaluación, capitulo tres: supervisión y evaluación del desempeño de la fuerza de ventas y capitulo cuatro: planeación de ventas. Según las orientaciones el presente informe documental está basado en cuanto a la normativa de seminario de graduación de la UNAN-Managua y regido a la rúbrica de evaluación según las normas APA sexta edición la cual fue facilitada por nuestro docente y a la misma vez tutor de la UNAN Mangua, el buen desarrollo de la investigación fue obtenida de diferentes fuentes; así como: libros, sitios web y documentos web. Mencionando lo anterior, lo investigado acerca del tema abordado en nuestro seminario de graduación servirá como un medio para obtener conocimiento acerca del tema y como guía para futuras investigaciones

LOS FACTORES DE CALIDAD DE LOS SERVICIOS EN LA LEALTAD DE LOS COMENSALES DE LOS RESTAURANTES DE MARISCOS, RIOBAMBA, ECUADOR VISTO DESDE UN SISTEMA DE SIMULACIÓN DE IMPACTO

El objetivo de la presente investigación fue identificar los factores de riesgo y éxito de la calidad de los servicios a través del diagrama de influencias y determinar su impacto en la lealtad de los comensales de los restaurantes de mariscos de la ciudad de Riobamba – Ecuador. Se realizó un diagnóstico de las variables de estudio y se identificaron las causas de los niveles de la lealtad de los comensales, así como se planteó un modelo de diagrama de influencia para conocer el impacto probabilístico de los factores de calidad de los servicios en la lealtad de los comensales. La población estuvo conformada por 3.451 comensales que han consumido en los meses de octubre y noviembre del 2015 y se trabajó con una muestra de 346 comensales. El factor de la calidad de los servicios de los restaurantes de mariscos de la ciudad de Riobamba Ecuador, tuvo un impacto en la lealtad de los comensales ya que si mejora en los factores críticos de éxito identificados, la probabilidad de que un comensal tenga la categoría o el perfil de apóstol alcanza a una probabilidad de 67.6%; y que su perfil sea indiferente es del 22.5% El grado o nivel de lealtad de los comensales alcanzó a 86.5444 medido en una escala porcentual el cual es muy favorable para el restaurante porque indica que el comensal tiene un perfil de apóstol y este perfil lo define como un cliente cuyo comportamiento es favorable; es decir, el comensal volverá con frecuencia y recomendará a sus amigos y familiares.PALABRAS CLAVE: diagramas de influencia; calidad del servicio; lealtad del comensal.THE QUALITY FACTORS OF THE SERVICES IN THE LOYALTY OF THE GUESTS OF THE RESTAURANTS OF MARISCOS, RIOBAMBA, ECUADOR SEEN FROM AN IMPACT SIMULATION SYSTEMABSTRACTThe objective of the present investigation was to identify the risk factors and success of the quality of the services through the influence diagram and determine their impact on the loyalty of the diners of the seafood restaurants of the city of Riobamba - Ecuador. A diagnosis of the study variables was carried out and the causes of the levels of diner loyalty were identified, as well as an influence diagram model was proposed to know the probabilistic impact of the service quality factors on loyalty of the diners. The population was made up of 3,451 diners who consumed in the months of October and November 2015 and a sample of 346 diners was used. The factor of the quality of the services of the seafood restaurants of the city of Riobamba Ecuador, had an impact on the loyalty of the diners since if it improves in the critical factors of success identified, the probability that a diner has the category or the apostle profile reaches a probability of 67.6%; and that their profile is indifferent is 22.5% The degree or level of loyalty of the diners reached 86.5444 measured on a percentage scale which is very favorable for the restaurant because it indicates that the diner has an apostle profile and this profile defines it as a customer whose behavior is favorable; that is, the diner will return frequently and recommend to their friends and family.KEYWORDS: influence diagrams; quality of service; diner loyalty

Immediate impact of COVID-19 pandemic on farming systems in Central America and Mexico

In this article we present a first attempt to understand the immediate impact of COVID-19 and the sanitary measures taken by governments on farming systems in Central America and Mexico (CAM). Through a review of information generated in these initial months of the COVID-19 pandemic (webinars, blogs, electronic publications, media) and 44 interviews with key informants across the region, we have identified the main impacts felt by different types of farming systems in the region. The results presented focus only in the immediate effect of COVID-19 pandemic and the mechanisms implemented by farmers in the first months. Whether these impacts and response mechanisms will result in a transformation of the farming systems towards greater resilience and sustainability is still an open question

The impact of surgical delay on resectability of colorectal cancer: An international prospective cohort study

AIM: The SARS-CoV-2 pandemic has provided a unique opportunity to explore the impact of surgical delays on cancer resectability. This study aimed to compare resectability for colorectal cancer patients undergoing delayed versus non-delayed surgery. METHODS: This was an international prospective cohort study of consecutive colorectal cancer patients with a decision for curative surgery (January-April 2020). Surgical delay was defined as an operation taking place more than 4 weeks after treatment decision, in a patient who did not receive neoadjuvant therapy. A subgroup analysis explored the effects of delay in elective patients only. The impact of longer delays was explored in a sensitivity analysis. The primary outcome was complete resection, defined as curative resection with an R0 margin. RESULTS: Overall, 5453 patients from 304 hospitals in 47 countries were included, of whom 6.6% (358/5453) did not receive their planned operation. Of the 4304 operated patients without neoadjuvant therapy, 40.5% (1744/4304) were delayed beyond 4 weeks. Delayed patients were more likely to be older, men, more comorbid, have higher body mass index and have rectal cancer and early stage disease. Delayed patients had higher unadjusted rates of complete resection (93.7% vs. 91.9%, P = 0.032) and lower rates of emergency surgery (4.5% vs. 22.5%, P < 0.001). After adjustment, delay was not associated with a lower rate of complete resection (OR 1.18, 95% CI 0.90-1.55, P = 0.224), which was consistent in elective patients only (OR 0.94, 95% CI 0.69-1.27, P = 0.672). Longer delays were not associated with poorer outcomes. CONCLUSION: One in 15 colorectal cancer patients did not receive their planned operation during the first wave of COVID-19. Surgical delay did not appear to compromise resectability, raising the hypothesis that any reduction in long-term survival attributable to delays is likely to be due to micro-metastatic disease