Browsing by Issue Date, starting with "2018-09-27"
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- Implementation of statistical process control in a bottling line in winery industryPublication . Abreu, António; Requeijo, José; Calado, João Manuel FerreiraIntroduction: 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.
- Some ideas concerning Public Relations in sports organizationsPublication . Eiró-Gomes, Mafalda; Raposo, Ana Luísa Canelas RasquilhoThis paper addresses the second phase of an ongoing project that involves mixed methods analysis and that has as its main purpose to understand the role of the communication professionals in the third sector, or what some authors call, the non-for-profit sector (Neto, et al., 2017). Moreover, the way these organizations understand what can be considered under the scope of the functions of these professionals was also under investigation. After a work that dealt with the mainstream of the area, the Non-Governmental Organisations for development, the researchers turned their look to almost an unknown field, the national sports federations. These are important actors in the civil society in Portugal, as in so many other countries, due to the fact that they are responsible entities for the promotion of sports at all levels of society.