ISEP - CIDEM - Centro de Investigação em Engenharia Mecânica
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O CIDEM reúne o conjunto de actividade de investigação científica fundamental e aplicada, de desenvolvimento experimental, de formação profissional e de prestação de serviços no âmbito da Engenharia Mecânica.
Objetivos:
Aprofundar os conhecimentos científicos das áreas de investigação fundamental e aplicada;
Criar e apoiar iniciativas conducentes à realização de acções de formação de recursos humanos naqueles domínios;
Difundir o conhecimento científico na sua área de actividade, nomeadamente através da edição de publicações e da realização de encontros, congressos e colóquios nacionais e internacionais;
Promover o intercâmbio científico com instituições e investigadores afins;
Realizar trabalhos de investigação, desenvolvimento e consultoria para o exterior;
Contribuir para o processo de desenvolvimento e modernização do sector produtivo do país na área de Engenharia.
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Browsing ISEP - CIDEM - Centro de Investigação em Engenharia Mecânica by resource type "book part"
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- A Diagnostic Analysis of Absenteeism—A Case Study in a Portuguese Cork IndustryPublication . Silva, Alfredo; Ramos, Ana Luísa; Brito, Marlene; Ramos, AntónioAbsenteeism is defined as the absence of a worker from his or her workplace during a normal day’s work schedule and is seen as a problem which companies face every day. The absence of an employee can result in a significant drop in productivity and the company’s daily revenue can be negatively impacted by it, which when multiplied by the absence of multiple workers in different days can have a harmful impact on the company’s financial situation. However, most managers neither understand nor have looked into the causes of their absence issue. This study took place at a company which produces cork stoppers, which deals with a problem of high absenteeism that costs around 1,200,000€ per year to the company. The main goal of this study is to identify the sectors in this com- pany which have the highest percentage of absenteeism, quantify its impact on related outcomes and diagnose its causes. The results of this study show that most absenteeism occurs in production areas and the causes are related to musculo- skeletal problems. The consequences involve various costs to the company, some of them difficult to quantify.
- Ensino a distância – Perceções de estudantes de engenhariaPublication . Monteiro, Fátima; Duarte, Marina; Leite, CarlindaO capítulo relata um estudo sobre o ajustamento dos estudantes de engenharia à transição brusca do ensino presencial para o ensino mediado por computador por ocasião do estado de emergência e confinamento em 2020 e 2021.
- Ergonomic Analysis in Lean Manufacturing and Industry 4.0—A Systematic ReviewPublication . Brito, Marlene; Gonçalves, Maria Antónia; Ramos, Ana Luísa; Carneiro, PaulaIn 2015, the UN defined well-being and decent work/economic growth as two of 17 sustainable development objectives. Nevertheless, the extreme pressure for businesses to be competitive in their markets of choice seems to be having a negative effect on workers’ well-being. In the manufacturing sector, the effective inclusion of Ergonomics in processes and installations has been proven to decrease costs related to disability, extra or overtime hours, medical care and premiums or fines for occurrences. The aim of this work was to review the existing scientific knowledge about the impact of adopting LPS (Lean Production Systems—a model used to increase competitiveness by the creation of more value for customers with fewer resources) in manufacturing companies from the point of view of Ergonomics. It reports, based on the literature reviewed, how the integration of both LPS and Ergonomics principles, from the workstation design phase onwards, can bring benefits to the workers’ welfare and simultaneously potentiate improvements in productivity. This paper also intends to present trends and opportunities for future research in this area, including in the Industry 4.0 field. In the authors’ opinion, this paper is a valuable contribution for practitioners, in manufacturing environments, and researchers.
- Evaluating Suppliers in the Olive Oil Sector Using AHPPublication . Fontes, Dalila B. M. M.; Pereira, Maria Teresa; Dias, ElisabeteThis work proposes a multi-criteria decision making approach to help assessing and selecting suppliers in the olive oil sector. Olive oil is a protected agricultural product, by region and origin certificate. Therefore to select a supplier, it is of utter importance to inspect and test (taste, colour, smell, density, among others) the olive oil in addition to the supplying company. The identification of possible suppliers was done in two stages: firstly, the region of origin from which to choose possible suppliers was identified and then potential suppliers were evaluated on a set of characteristics for which minimum threshold values were set. From this study, which is not part of the research reported here, we were able to identify the suppliers of interest. Due to the several characteristics and characteristic dimensions used to choose a supplier we resort to the Analytic Hierarchy Process to rank them, this way allowing for a better choice. The rank obtained is robust as the top ranked supplier remains the same for any reasonable change in the criteria weighs and in the evaluation of the suppliers on each criterion. The involved company found the results of value, as well as the lessons learned by addressing the supplier evaluation problem using a more systematic approach.
- A flexibility reference model to achieve leagility in virtual organizationsPublication . Bastos, João; Almeida, António; Azevedo, Américo; Ávila, PauloThe paper proposes a Flexibility Requirements Model and a Factory Templates Framework to support the dynamic Virtual Organization decision-makers in order to reach effective response to the emergent business opportunities ensuring profitability. Through the construction and analysis of the flexibility requirements model, the network managers can achieve and conceive better strategies to model and breed new dynamic VOs. This paper also presents the leagility concept as a new paradigm fit to equip the network management with a hybrid approach that better tackle the performance challenges imposed by the new and competitive business environments.
- How a CRM Tool Can Contribute to a Better Business Performance: The Case of a Shipping CompanyPublication . Fróis, Joana; Pereira, Maria Teresa; Ferreira, Fernanda A.Globalization is revolutionizing our way of living and the way business companies work. Technology is the reason for it, because it provides solutions that help the workers perform more effectively and efficiently and that allow for better execution. The development of relationships with the customer gives companies a better knowledge and understanding of their needs and leads to new strategies that aim at better results for the customer. Customer Relationship Management (CRM) tools are taken as important tools for this, since they help analyzing the companies’ Key Performance Indicators (KPIs). In this article we use the case of a shipping company in order to understand how such systems can contribute to such improvement. By analyzing the company’s CRM we suggest an adjustment to the business in order to get a better performance from it.
- Learning in the Laboratory: Accessing Videos with Quick Response CodesPublication . Duarte, Marina; Baptista, Andresa; Pinto, Gustavo FilipeUsing QR codes to access videos in engineering laboratory classes might be a successful way of building a bridge from concrete to digital content. With QR codes placed on an apparatus, students know exactly which video to watch, allowing them to view the videos while performing the experiment or at home when writing the report. Low-cost videos do not require expensive equipment and software, and keeping them short assures a minimum download time for use with smartphones and tablets. The aim of this chapter is to evaluate the importance undergraduate engineering students attribute to these videos and their reaction to the possibility of accessing them with QR codes scanned by a smartphone or a tablet, using access statistics and video viewings to support the findings. Results show students attributed some importance to the videos, and that the QR codes are very helpful as means to quickly and easily access the videos.
- Market of resources for virtual enterprise integrationPublication . Cunha, Maria Manuela; Putnik, Goran; Ávila, PauloMost definitions of virtual enterprise (VE) incorporate the idea of extended and collaborative outsourcing to suppliers and subcontractors in order to achieve a competitive response to market demands (Webster, Sugden, & Tayles, 2004). As suggested by several authors (Browne & Zhang, 1999; Byrne, 1993; Camarinha-Matos & Afsarmanesh, 1999; Cunha, Putnik, & Ávila, 2000; Davidow & Malone, 1992; Preiss, Goldman, & Nagel, 1996), a VE consists of a network of independent enterprises (resources providers) with reconfiguration capability in useful time, permanently aligned with the market requirements, created to take profit from a specific market opportunity, and where each participant contributes with its best practices and core competencies to the success and competitiveness of the structure as a whole. Even during the operation phase of the VE, the configuration can change, to assure business alignment with the market demands, traduced by the identification of reconfiguration opportunities and continuous readjustment or reconfiguration of the VE network, to meet unexpected situations or to keep permanent competitiveness and maximum performance (Cunha & Putnik, 2002, 2005a, 2005b).
- A Model for the Multi-depot Online Vehicle Routing Problem with Soft DeadlinesPublication . Silva, Álvaro; Ferreira, Luís Pinto; Pereira, Maria Teresa; Neves-Moreira, FábioIn many companies in the automotive industry there are challenges in some key processes in their logistic departments, mainly in internal logistics. These challenges happen due to poorly defined rules for the transportation of goods, resulting in a great cost associated with the time lost in the process. Also, the optimization of these processes, incrementing the efficiency of internal logistics can bring competitive advantages to the companies. For that matter, this study was developed at a major tire manufacturing company and proposes a model for the optimization of in-bound logistics, viewed as an online vehicle routing problem with soft deadlines (OVRPSD), using multiple depots. The main goal of this study is the increase of efficiency in logistic, optimizing the number of vehicles to supply the machines in order to reduce the stopping time of machines due to the lack of tires to consume.
- One Dimensional Trim Loss Decision Support ToolPublication . Ferreirinha, Luís; Baptista, Sara; Pereira, Ângela; Pinto Ferreira, Luís; Pereira, Maria Teresa RibeiroThe topic Cutting & Packing (C & P) has been published in many papers, and its importance within many industrial sectors is undeniable. For these reasons, several studies have been carried out on the optimization of the cutting process in order to improve the utilization of the useful area or the useful length of the raw material. Thus, this work aims to develop a computational tool that resolves the problem of minimizing losses in one-dimensional cuts. This problem is often encountered in industrial processes, where the beginning of the transformation and production of the raw material corresponds to the cutting process. To do so, the cutting problem will be formulated, and the Open Solver supplement will be used to obtain the solution.
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