Revista Millenium
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Browsing Revista Millenium by Author "Abreu, António"
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- Implementation of statistical process control in a bottling line in winnery industryPublication . Abreu, António; Requeijo, José; Calado, JoãoIntroduction: The great demand of the markets has led to situations in which the production systems are characterized by the production of several batches but of small size. This new paradigm requires that adequate techniques be developed, both in terms of planning and in terms of Statistical Process Control (SPC), since there may be situations where it is not possible to collect enough data to properly estimate the parameters of the process (mean and variance). Objectives: Implementation of Statistical Process Control techniques in a wine industry in order to improve its final product. Methods: Whenever there is not enough data to properly estimate the parameters of the process, the suggested approach, is to adopt the developments proposed by Charles Quesenberry. In this case, the statistic of the sample at time i is transformed through the estimations of the process parameters using the information obtained (data) until the instant (i-1). The univariate study of process capability is performed through the capability indices QL and QU. Thus, in this paper, two situations of statistical control are addressed, one in which a univariate study is done, based on Q charts, and another in which the multivariate study is made, based on the MQ charts. Results: This study comprised the implementation of the SPC) of a wine brand that has low production volumes, in the process of bottling wine, which is considered a critical step since some care is needed, such as avoiding the occurrence of microbiological contaminations or oxidation of the wine. Conclusions: Whenever it is not possible to apply traditional control charts the use of the control Q charts (univariate analysis) and the control MQ charts (multivariate analysis) are the most appropriate choice not only for the control of one or more products but also for several sets of quality characteristics.
- A study on the feasibility of implementing a quality management system, based on the EFQM model in a School of EngineeringPublication . Santos, Ricardo; Abreu, AntónioIntroduction: Currently, and in a competitive context, Higher Education Institutions (HEIs) increasingly depend on the quality of their services, not only to satisfy their different stakeholders, but also to attract funding. In this way, HEIs tend to incorporate Internal Quality Management Systems (IQMS) into their strategy with a view to the continuous improvement of their performance. This work intends to analyze the applicability of an HEI, based on the European Foundation for Quality Management (EFQM) model, through its implementation in a public Portuguese HEI. Objectives: Contribute to a critical analysis of the applicability of an IQMS in the organizational performance of an HEI, based on the EFQM model, and implemented in a published HEI. Methods: A number of advantages and difficulties were obtained. For the difficulties obtained, it was proposed a set of suggestions for its overcoming. Results: A number of advantages and difficulties were obtained. For the difficulties obtained, it was proposed a set of suggestions for its overcoming. Conclusions: The application of the SIGQ in the HEI under study, proved to be beneficial, due to a set of perceived advantages, among them, the increase of the organizational efficiency. For each one of the disadvantages identified in the study, a set of solutions was proposed for its mitigation, thus allowing to reinforce the potential of applying the EFQM model in an HEI.