STUDY ON SUBJECTIVE EVALUATION OF PERCEIVED QUALITY OF FLAP MOBILE PHONES AND PREDICTION OF SENSORIAL PROFILE

Expert opinion is fundamental in any evaluation of perceived quality. However, this can pose some problems for firms. Experts need to be trained, paid and be completely devoted to their task and ideally there must be more than one. All these factors add up to expert advice being very costly for a firm. In order to find a solution to this, we have created a referential for sensorial evaluation from which we can deduce expert responses without calling on their assistance. Using a previous analysis of perceived quality, where experts took part and gave their opinions, we found some correlations between the sensorial descriptors and the objective descriptors. The methods employed are quite distinctive from each other and this enables us to check the results. The methods employed comprise: Principal Component Analysis, Multiple Factorial Analysis of correlations, Cross Tabulation, classical statistics and finally, we have represented the referential visually using a graph which enables us to observe the correlations clearly. Following on from this we created a sensorial evaluation referential. This referential is a set of inference rules “IF…THEN…. ” which enables us to pass from psychoacoustic or biodynamic descriptors to sensorial descriptors and vice versa.