12 documents found, page 1 of 2
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...
Literature review on autonomous production control methods
Martins, Luis; Varela, M.L.R.; Fernandes, Nuno Octávio Garcia; Carmo-Silva, Silvio; Machado, JoséProduction environments are becoming more complex and dynamics. This is influenced by external factors related with products' characteristics and costumers' requirements and internal factors related with processing times variability, machine failures, setup times, between others. To face this increasing complexity and dynamics, it is crucial to have effective production control methods, considering Interoperabi...
Comparative study of autonomous production control methods using simulation
Martins, Luís Miguel; Fernandes, Nuno Octávio Garcia; Varela, M.L.R.; Dias, Luis S.; Pereira, Guilherme; Silva, Sílvio CarmoManufacturing companies need to be effective in meeting customers’ delivery requirements. Due to customers’ expectations of shrinking delivery times, manufacturing lead times need to be short. This can be achieved through efficient Production Activity Control (PAC) methods. Currently PAC methods rely mostly on centralized decision-making and, seeming not to be adequate to deal with the increasing complexity and...
Autonomous production control: A literature review
Martins, L.; Fernandes, Nuno Octávio Garcia; Varela, M.L.R.Autonomous production control (APC) aims at improving production systems performance through fast and flexible reaction to changes in dynamic production environments. APC shifts the power of decision from a central planning unit, towards single intelligent and distributed logistic objects that can cope with the rising complexity of today’s manufacturing systems. The purpose of this research is to analyse the cu...
Designing and implementing interdisciplinary projects in a systems engineering ...
Carmo-Silva, S.; Dias, Luis S.; Pereira, Guilherme; Fernandes, Nuno Octávio Garcia; Alves, Anabela Carvalho; Lima, Rui M.Interdisciplinary projects (IP) carried out by teams of students have been recognized as an important approach for learning in several fields and at several levels of education. In higher education, it can be an important drive for student learning motivation and an advantage for students when entering the working marketplace. The experience acquired while developing IP gives students technical and transversal ...
A comparison of production control systems in a flexible flow shop
Silva, C.; Reis, V.; Morais, A.; Brilenkov, I.; Vaza, J.; Pinheiro, T.; Neves, M.; Henriques, M.; Varela, Maria Leonilde Rocha; Pereira, GuilhermeProduction control in make-to-order must address the companies’ need for short delivery times and on-time deliveries. Several production control systems may be used to meet these needs. This paper presents a simulation study to evaluate the delivery performance of the TKS, GKS and POLCA production co ntrol systems, in the context of a make-to-order flexible flow shop. Since TKS is used for make-to-stock manufac...
Materials flow control in hybrid make-to-stock/make-to-order manufacturing
Rocha, Filipa; Silva, Emanuel; Lopes, Ângela; Dias, Luis S.; Pereira, Guilherme; Fernandes, Nuno Octávio Garcia; Silva, Sílvio CarmoToday’s company competiveness is favoured by product customisation and fast delivery. A strategy to meet this challenge is to manufacture standard items to stock for product customisation. This configures a hybrid environment of make-to-stock and make-to-order. To explore the advantages of this requires good understanding of production control. Thus, we study production under hybrid MTS-MTO, organising the syst...
Comparing material flow control mechanisms using simulation optimization
André, Maria Manuela Lobão Alves; Dias, Luís M. S.; Pereira, Guilherme; Oliveira, José A.; Fernandes, Nuno Octávio Garcia; Silva, Sílvio CarmoIn this study, discrete event simulation is used for comparing the performance of three material flow control mechanisms: push-MRP, Generic Kanban System (GKS) and generic Paired-cell Overlapping Loops of Cards with Authorization (GPOLCA). The former does not impose restriction to the number of jobs that are released into the supply chain. The latter two are card-based control mechanisms, where the number of jo...
Workload control under continuous order release
Fernandes, Nuno Octávio Garcia; Silva, Sílvio CarmoPast research on workload control (WLC) has been essentially focused on discrete order release. This means that release of orders to the shop floor takes places on a periodic basis. Continuous order release has been somehow neglected, in spite of its apparent potential for improving system performance, including the reduction of order flow times. This paper addresses a simulation study of this order release app...
How to release orders in assembly job shops?
Fernandes, Nuno Octávio Garcia; Silva, Sílvio CarmoThis paper addresses the problem of controlling the production of complex products needing assembly operations. It presents a simulation study of how WLC release methods behave in an assembly job shop where due dates are set by customers. In particular two alternative strategies to drive the release of work orders are investigated, namely: (1) assigning the same due date and different planned release dates to e...