(Ecovidrio, 2005), while in Belgium the glass sector (including the production of sheet glass) produces some 1.6 million metric tons (Fe´de´ration de la Industrie du Verre, 2003).
When studying the glass container manufacturing industry, it can be seen how common it is for glass container manufacturers to be concerned with the quality of their products, which may be affected by the percentage of calcine incorporated into the productive process.
The container may need different characteristics, depending on the product it is to contain. For this reason, it would seem of interest to first carry out a study of the characteristics of the containers required by the firms under study.
The following section describes the hypotheses that we wish to test, along with the methodology employed.
Finally, the main results obtained are presented along with the most important conclusions of the research carried out.