B. Álvarez-Ros, V. Giner-Bosch, T. Carot, V. Soler Baquero
This work deals with the case of a waste treatment company, which separates waste into different products or derivatives. In this type of company, clients’ requirements are usually established in terms of the percentage of impurities existing in one bale of product —this percentage is, therefore, the quality characteristic object of interest. Due to the unaffordable cost of sampling final bales, we propose taking small samples of product before bales are created to obtain the distribution of the impurity percentage in each derivative. Using appropriate statistical tools, it is possible to estimate the probability of a defective bale and the probability of having a batch rejected. From this, we have also designed an ad hoc precontrol chart which is able to detect variations in further obtained samples of product. This would allow the anticipation of possible future problems of non-compliance with quality requirements. Results on a real case show the efficiency of this chart.
Palabras clave: Statistical process control, waste treatment, acceptance sampling, precontrol charts
Programado
X05.4 Control de Calidad
7 de septiembre de 2016 12:30
Aula 21.07
