Ilzarbe, L. (Laura)
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- Practical applications of design of experiments in the field of engineering: A bibliographical review.(2008) Ilzarbe, L. (Laura); Álvarez-Sánchez-Arjona, M.J. (María Jesús); Viles-Díez, E. (Elisabeth); Tanco-Rainusso, M. (Martín)The design of experiments (DoE) methodology is a technique that has been applied for many years in industry to improve quality. In this study, a summary of 77 cases of practical DoE application in the field of engineering is presented. All of the cases were published in important scientific journals between 2001 and 2005. The type of design that is applied, the size of the experiment, the number of factors that influence the response variable, and the sector of application of the design are analyzed. In addition, the increasing use of these designs over time is demonstrated.
- How is Experimentation Carried Out by Companies? A Survey of Three European Regions.(2008) Tanco-Rainusso, M. (Martín); Viles-Díez, E. (Elisabeth); Ilzarbe, L. (Laura); Álvarez-Sánchez-Arjona, M.J. (María Jesús)A survey was carried out to characterize experimentation in three different European regions: the Baden-Wurttemberg region, The Basque Country and the rest of Spain. Results of the survey show that even though experimentation is a frequent activity, almost 95% of companies conduct experiments; the strategies used to carry them out are primitive. The one-factor-at-a-time strategy is used by 75% of companies far more than the 23%, which apply design of experiments (DoE). Results show that this may be due to the current lack of knowledge of DoE in these regions, where only 33% are familiar with the technique. Finally, the rate of applications of DoE among Six Sigma users is 40%, twice that of non-users, which stands at 19%.
- Is design of experiments really used? A survey of Basque industries.(2008) Tanco-Rainusso, M. (Martín); Viles-Díez, E. (Elisabeth); Ilzarbe, L. (Laura); Álvarez-Sánchez-Arjona, M.J. (María Jesús)A new survey is presented concerning the knowledge and use of the design of experiments technique (DoE) within industry in the Basque Country, a region recognised throughout Europe for its quality management. The survey was carried out within manufacturing companies, yielding a response rate of 18%. Results show that 94% of companies undertake experimentation; most of them use one-factor-at-a-time strategies, and only 20% of those follow a pre-established statistical methodology. Survey results show that research and development and manufacturing make up 85% of DoE use. Furthermore, results show that lack of knowledge about general statistics is commonplace and only 31% of companies claim to be knowledgeable about DoE. In addition, although Taguchi methods are well known among companies, only 7% apply this method. Despite every effort by specialists in quality and statistics, DoE has yet to be applied as widely as it could and should be.
- Implementation of Design of Experiments projects in industry.(Wiley, 2009) Tanco-Rainusso, M. (Martín); Viles-Díez, E. (Elisabeth); Ilzarbe, L. (Laura)Although design of experiments (DoE) is a common feature of statistics and quality literature, it is insufficiently used in industry. Surveys and numerous articles alike have verified that a gap exists between theoretical development and its effective application in industry. Therefore, we have developed a complete, friendly and easy-to use methodology, from an engineering point of view, to ease the implementation of DoE in companies. Our approach presents a framework for the experimentation process that follows the traditional DMAIC steps of 'Six Sigma' as a generic problem solving methodology. We aim to present a complete overview of the experimentation process useful for those engineers, statisticians and scientists who are not experts in DoE.