46 documents found, page 1 of 5
Simulating product costs under stochastic conditions using the ABC matrix model
Henriques, Marcelo Filipe Nunes; Dias, Luis S.; Afonso, Paulo; Ferreira, Luís PintoCosting models tend to follow a top-down or, alternatively, a bottom-up approach, following, respectively, a financial/accounting or an engineering/production perspective. Regardless of the approach used, cost models tend to be based on past information and be deterministic, contributing little to decision making at the organization’s operational and strategic levels. Moreover, the current business environment ...
Assessment of alternative quality control plans in dynamic contexts: a simulati...
Sousa, Sérgio; Dias, Luis S.; Nunes, Eusébio P.Process quality planning should establish a Quality Control Plan (QCP) to achieve the desired quality level with minimum Cost of Quality (CoQ). This plan establishes the critical quality variables, control stations in the process, and control method at each control station. The purpose of this study is to, through a simulation approach, determine a QCP for a manufacturing process, which minimizes the CoQ. The i...
Assigning products in a Vertical Lift Module supermarket to supply production l...
Vieira, António Amaro Costa; Dias, Luis S.; Pereira, Guilherme; Oliveira, José A.This paper presents the development of a mathematical model for product assignment in a Vertical Lift Module (VLM), which are increasingly em-ployed in the industrial sector due to their advanced technology and efficient parts-to-picker process. Mathematical modelling plays a crucial role in address-ing the complexity of these problems and providing intelligent and innovative solutions. Despite being a tactical...
Quality cost of 100% inspection on manufacturing processes: Advantages of using...
Dias, Luis S.; Nunes, Eusébio P.; Sousa, SérgioIn manufacturing companies, quality costs can be quantified and reduced. Nevertheless, there are obstacles to their determination, restricting the ability of organisations to establish quality cost reduction programmes to become more competitive. The paper's objective is to propose a simulation approach to determine the quality cost of 100% inspection strategy. The proposed approach is developed in SIMIO and pr...
Activity based simulation - A modeling tool for new teaching-learning strategies
Pereira, Guilherme; Vieira, António Amaro Costa; Machado, Ricardo J.; Ferreira, Bruno Lourenço Silva; Dias, Luis S.; Oliveira, José A.Teaching and learning Discrete Event Simulation (DES) at universities within the context of undergraduate studies in industrial and engineering management is not thoroughly covered in the literature. In fact, most strategies tend to solely address commercial tools, resulting on too much focus on syntax, semantics and getting used to the interface of a particular tool, rather than on simulation fundamental conce...
Evaluating the make-to-order performance of production control systems in a re-...
Araújo, Ana; Pires, Margarida; Pereira, Maria; Ribeiro, Sónia; Varela, M.L.R.; Henriques, Marcelo Filipe Nunes; Dias, Luis S.; Pereira, GuilhermeIn the current Industry 4.0 era, simulation, along with approaches for dealing with production activity control, is considered of the utmost importance, for instance, in cyber-physical production systems, but also in any other traditional manufacturing environment. In this context, there are varying kinds of production activity control mechanisms that can be explored, and a wide range of contributions are alrea...
Impact of order Size on quality Cost of 100% Inspection: A simulation approach
Nunes, Eusébio P.; Sousa, Sérgio; Dias, Luis S.In manufacturing companies, Cost of Quality (COQ) is in!uenced by inspection strategies. "e determination of CoQ, may involve in complex analitycal models. "e paper’s objective is to assess, through a simulation approach, the impact of order size in CoQ per unit when adopting 100% inspection, considering inspection errors and that some defects are repairable. "e proposed approach is developed in SIMIO to determ...
On the integration of industrial data and analysis with simulation in a company...
Mesquita, Catarina; Vieira, António Amaro Costa; Dias, Luis S.; Pereira, Guilherme; Oliveira, José A.Nowadays, companies are constantly seeking to develop tools to increase productivity, production flexibility and the quality of their products, or to reduce costs, delays and their exposure to risks. In fact, such improvements can be achieved in the scope of product as well as of process improvement. In industrial contexts, often, such improvements can be achieved by implementing tools to access the intended in...
Supply chain data integration: a literature review
Vieira, António Amaro Costa; Dias, Luis S.; Santos, Maribel Yasmina; Pereira, Guilherme; Oliveira, José A.Supply chains (SCs) are dynamic networks subject to uncertainties and risks that may occur anywhere, anytime, and whose consequences affect the entities that comprise such SC, possibly affecting others. In fact, there are several examples wherein the occurrence of certain events resulted in considerable costs. Thus, it is important to ensure that SCs can apply preemptive measures, rather than just react to disr...
Are simulation tools ready for big data? Computational experiments with supply ...
Vieira, António Amaro Costa; Dias, Luis S.; Santos, Maribel Yasmina; Pereira, Guilherme; Oliveira, José A.Peer-review under responsibility of the scientific committee of the International Conference on Industry 4.0 and Smart Manufacturing. The need and potential benefits for the combined use of Simulation and Big Data in Supply Chains (SCs) has been widely recognized. Having worked on such project, some simulation experiments of the modelled SC system were conducted in SIMIO. Different circumstances were tested, in...