6 documents found, page 1 of 1
Simulation approach for solving production problems reducing total processing time
Pereira, Sibelle; Henriques, Marcelo Filipe Nunes; Varela, M.L.R.; Vicente, José; Freitas, Luis; Machado, JoséThis paper presents an application of computational simulation to a production problem on unrelated parallel machines and dependent setup times, aiming at the reduction of jobs’ total processing time (makespan). The scenarios studied by Rabadi, et al. (2014) were used, along with the SIMIO simulation software, to model and conduct experiments to study the impact of a set of sequencing rules. Based on the comput...
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 ...
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...
Analysis of an elevator system using discrete event simulation: case study
Henriques, Marcelo Filipe Nunes; Vieira, António Amaro Costa; Dias, Luis S.; Pereira, Guilherme; Oliveira, José A.This paper documents the work conducted to simulate an elevator system, using SIMIO software. The modelled system represents a case study that was analyzed in a hospital at Braga, Portugal. A previ-ous work on the same case study concluded that the best dwell time configuration would be around 10 seconds, however it did not consider the impact of different client demand on the elevator system. In this sense, th...
Impact of dwell time on vertical transportation through discrete simulation in ...
Henriques, Marcelo Filipe Nunes; Vieira, António Amaro Costa; Dias, Luis S.; Pereira, Guilherme; Oliveira, José A.This work has the objective of simulating an elevator system, using SIMIO software. Firstly, two different approaches, and its implementation, will be explained and compared: Vehicle vs. Entity. After selecting the Entity-approach, due to its more flexible processes and the limitations of the Vehicle-approach, it will be used to conduct the simulation experiments. The purpose is to evaluate the impact of dwell ...
Simulação e melhoria de um sistema de gestão de elevadores
Henriques, Marcelo Filipe NunesO presente trabalho tem como objetivo simular um elevador, quer do ponto de vista do transporte de passageiros, mas também do ponto de vista da tomada de decisão de quem transportar. Este último ponto é a génese do sistema de gestão de elevadores, responsável pelo controlo do elevador, mediante vários fatores, de onde se destacam as chamadas, onde cada passageiro solicita o elevador; e os destinos, o andar pret...