How to Improve the Monitoring of Subjective Analytical Methods and Assessors - The Case of Wine

Abstract

Due to possible various physiological errors in sensory testing, regardless of knowledge and experience, it is necessary to control the results and assessors. This paper aims the possibility of some statistical tools based on laboratory control charts to monitor assessors in wine sensory analyses done in the certification procedure. The data of control charts and reliable results were processed, and individually the results of "100 points" and "Yes/No" methods. The possibility of checking the consistency and concordance of the assessors using wine faults descriptors is also presented. It has been observed that the Chi-square test and some graphical statistics, such as scatter with correlation analysis, can be a good tool in assessors monitoring. The results of sensory analyses affect the wine declaring, and therefore, continued development of technical conditions and tools in the monitoring of assessor's performance is expected to reduce subjectivity and potential errors.

Adaptation of expert wine assessors to less familiar sensory testing methods without pretraining

“…These requirements are based on the analytical purpose; assessors should verify product compliance with corresponding PDO specifications and both qualitative and quantitative properties. Such conditions may limit the potential source for new assessors, but they ensure the professionalism and reliability of the results in sensory analysis (Alpeza et al, 2022). The objective level of the assessor's knowledge, the frequency of work in sensory testing, and the subjective workloads are different, and sensory testing always contains risk (Doty et al, 1985, Parr et al, 2002, Tempere et al 2016.…”