Evaluation of the consumer's global satisfaction of the knits by using the desirability functions

Abstract

Quality is a multicriteria phenomenon that requires the simultaneous satisfaction of several criteria. In this study, we objectively represented the global quality of knits using a global quality index to simulate the consumer satisfaction degree. Every transformation function for each property gives the equivalent of a satisfaction degree calculated by the desirability function of the property while taking into account the target, acceptance intervals and requirement level. For each property influencing the global quality, we calculated the individual satisfaction degree and involve a relative weight to indicate the importance of property. The global satisfaction degree is represented with the help of only one function of global desirability, the Derrigen and Suich function, that takes into account the different parameters of manufacture as well as those of the consumer's taste and requirement. This satisfaction degree can also be interpreted as an indication of quality that allows us to foresee if the desired quality is satisfied or not.