7 documents found, page 1 of 1
Airline Rescuers
Sobreira, Ana; Oliveira, Guilherme; Elias, João; Carmo, ManuelRecently, at a global level, the COVID19 pandemic has had an impact on both people´s lives and companies. This has been devastating the economies, leaving the entire sector completely destroyed. Thierry Breton, European commissioner of interior markets, points out that airlines may suffer up to 90% drops in their activity. Following these discussions, some of the measures presented, which aim to regain the conf...
Creating knowledge and entrepreneurial capacity for HE students with digital ed...
Sousa, Maria José; Carmo, Manuel; Goncalves, Ana Cristina; Cruz, Rui; Martins, Jorge MiguelThis main paper goal is to propose a model of digital education methodologies and tools to develop knowledge and entrepreneurial capacity in Higher Education (HE) students. Digital education is increasingly influencing both classroom/campus-based teaching, but more import is leading to new models or designs for teaching and learning. The paper makes a literature review on e-education, start-up stages and e-educ...
STATISTICAL PROPERTIES AND SENSITIVITY OF A NEW ADAPTIVE SAMPLING METHOD FOR QU...
Carmo, Manuel; Infante, Paulo; Mendes, Jorge M.We present a new adaptive sampling method for statistical quality control. In this method, called LSI (Laplace sampling intervals), we use the probability distribution function of the Laplace standard distribution to obtain the sampling instants, depending on a k parameter that allows control of sampling costs. Several algebraic expressions concerning the statistical properties of the LSI method are presented. ...
Linear Programming Model Applied to the Resource Schedulling at Queue Systems
Carmo, Manuel; Silva, Paulo; Infante, PauloThe pressure to maintain (or increase) the level of competitiveness in companies leads to an ever-increasing requirement for effective management supported by the variety of existing resources, which tend to interfere into the work of the manager. Particularly, in the case of waiting queues, the most relevant aspect is the combination of the number of multitasking servers assigned to attend and the demand that ...
Intervalos de amostragem adaptativos inicialmente predefinidos para um risco cu...
Carmo, Manuel; Infante, Paulo; Mendes, JorgeNeste trabalho, analisamos a eficiência estatística de um novo método de amostragem, num contexto de controlo da qualidade, que combina dois outros métodos: um método que define os instantes de amostragem em função da estatística amostral (adaptativo), e outro cujos parâmetros são definidos no início do processo, mas que permanecem constantes ao longo do mesmo (predefinido). Desta forma, os instantes de amostra...
A different and simple approach for comparing sampling methods in quality control
Carmo, Manuel; Infante, Paulo; Mendes, JorgePurpose – The purpose of this paper is to measure the performance of a sampling method through the average number of samples drawn in control. Design/methodology/approach – Matching the adjusted average time to signal (AATS) of sampling methods, using as a reference the AATS of one of them the paper obtains the design parameters of the others. Thus, it will be possible to obtain, in control, the average number ...
Alguns resultados de robustez de um método adaptativo em controlo de qualidade
Carmo, Manuel; Infante, Paulo; Mendes, JorgeApresentámos, anteriormente, um novo método, adaptativo, que utiliza a função de Laplace para definir intervalos de amostragem. O método de amostragem, denominado LSI (Laplace Sampling Intervals), mostrou bom desempenho quando comparado com o método clássico FSI e com o método VSI. Neste trabalho apresentamos um estudo que permite avaliar a robustez deste método numa perspectiva de avaliar o seu desempenho esta...