56 documents found, page 1 of 6
Development of a Variant Process-Planning Tool: A Case Study
Santos, António Duarte; Ávila, Paulo; Santos, Bebiana; Mota, Alzira; Castro, Hélio; Ferreira, Luís Pinto; Bastos, João; Sá, José CarlosPurpose: This study addresses the development of a variant process planning tool, following the Knowledge-Based Variant Process Planning methodology, applied in a case study and presents the gains achieved. Methodology/Approach: Case study supported by six steps: (1) Feature Analysis, (2) Knowledge Retrieval, (3) Inference, (4) Plan Adaptation, (5) Knowledge Update, and (6) Plan Validation/Optimisation. Finding...
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 ...
Comparative analysis of Multicriteria Decision‐Making methods for bus washing p...
Ávila, Paulo; Mota, Alzira; Oliveira, Eliana; Castro, Hélio; Ferreira, Luís Pinto; Bastos, João; Fernandes, Nuno O.; Moreira, JoaquimWater is at the core of sustainable development, and its use for human activities, including vehicle washing, should be done in a sustainable way. There are several technical solutions for washing buses offering different performances, making it difficult to choose the one that best meets the requirements of each specific case. The literature on the topic hardly analyzes the choice of the best technical solutio...
Industry 4.0 in the automotive sector: development of a decision support tool f...
Bessa, Ruben; Ferreira, Luís Pinto; Fernandes, Nuno O.; Ávila, Paulo; Ramos, Ana L.The concept of Industry 4.0 promises to transversally revolutionise industries. Simulation, as one of the main pillars of Industry 4.0, allows improvements in the organisational and production processes of companies. This research work develops a decision support tool based on system dynamics, that address the problem of car dealership sales forecast and evolution depending on the commercial strategies adopted....
Demand driven material requirements planning: using the buffer status to schedu...
Fernandes, Nuno O.; Guedes, Nelson; Thürer, Matthias; Ferreira, Luís Pinto; Ávila, Paulo; Silva, Sílvio do CarmoDemand Driven Material Requirements Planning argues that production re-plenishment orders should be scheduled on the shop floor according to the buffers’ on-hand inventory. However, the actual performance impact of this remains largely unknown. Using discrete event simulation, this study com-pares scheduling based on the on-hand inventory, with scheduling based on the inventory net flow position. Results of our...
A simulation study of aircraft boarding strategies
Moreira, Hélio; Ferreira, Luís Pinto; Fernandes, Nuno O.; Silva, Francisco J.G.; Ramos, Ana L.; Ávila, PauloTo ensure the safety of passengers concerning virus propagation, such as COVID-19, and keep the turnaround time at low levels, airlines should seek efficient aircraft boarding strategies in terms of both physical distancing and boarding times. This study seeks to analyze the impact of different boarding strategies in the context of the International Air Transport Association’s recommendations during the pandemi...
The importance of the maintenance area in the hotel sector
Silva, Tiago Camarinha; Ferreira, Luís Pinto; Costa, Elga; Silva, Francisco J. G.; Ávila, PauloThe hotel sector is a diversified and highly technical sector, where the complexity of the facilities, the specific characteristics, and requirements of the area, as well as the regulations and applicable legislation, constitute an enormous challenge. Thus, a structured maintenance plan must include periodic intervention, the proper functioning of equipment, along with a greater reliability of services and ener...
Improving the design of nozzles used in zamak high-pressure die-casting process
Sousa, V.F.C.; Silva, Francisco J. G.; Ferreira, Luís Pinto; Campilho, R.D.S.G.; Pereira, Maria Teresa; Braga, E.The injection of light alloys is an activity that requires a high effort on the part of Engineering to maintain its competitiveness. Due to the temperatures used, the wear of the components connected to this manufacturing process is quite intense, requiring a constant updating effort. This work was developed with a view to solving problems related to the excessive wear of injection nozzles used in the die casti...
Concept and Design of Automated Moving Device for Healthcare Equipment
Faria, N.M.S.; Campilho, R.D.S.G.; Silva, Francisco J. G.; Ferreira, Luís PintoThe physical wear of health professionals arises mainly from the movement of people with reduced mobility, transport of stretchers, hospital beds and hospital carts. There is a lack of equipment that helps these professionals to move patients in hospital beds or stretchers. This work aims to design an equipment that removes health professionals’ function of moving patients from beds to stretchers, being able to...
New conceptual model of Reverse Logistics of a worldwide Fashion Company
Janeiro, Ricardo; Pereira, Maria Teresa; Ferreira, Luís Pinto; Sá, José Carlos; Silva, Francisco J. G.This paper focuses on the logistics activity of the Outlet Retail industry of accessories and clothing items produced by a Portuguese fashion company, operated by an also Portuguese Third-Party Logistics providers (3PL). The main goal of this study is to address and analyze the current business and process model used by the Portuguese 3PL, to compare it with other existing models within the state-of-art, and to...