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Properties of prediction sorting
Author(s) -
Berget Ingunn,
Næs Tormod
Publication year - 2004
Publication title -
journal of chemometrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.47
H-Index - 92
eISSN - 1099-128X
pISSN - 0886-9383
DOI - 10.1002/cem.852
Subject(s) - sorting , bootstrapping (finance) , product (mathematics) , computer science , raw material , quality (philosophy) , regression , stability (learning theory) , linear regression , fuzzy logic , process (computing) , raw data , regression analysis , mathematics , statistics , econometrics , algorithm , artificial intelligence , machine learning , philosophy , chemistry , geometry , organic chemistry , epistemology , operating system
One of the major sources of unwanted variation in an industrial process is the raw material quality. However, if the raw materials are sorted into more homogeneous groups before production, each group can be treated differently. In this way the raw materials can be better utilized and the stability of the end product may be improved. Prediction sorting is a methodology for doing this. The procedure is founded on the fuzzy c‐means algorithm where the distance in the objective function is based on the predicted end product quality. Usually empirical models such as linear regression are used for predicting the end product quality. By using simulations and bootstrapping, this paper investigates how the uncertainties connected with empirical models affect the optimization of the splitting and the corresponding process variables. The results indicate that the practical consequences of uncertainties in regression coefficients are small. Copyright © 2004 John Wiley & Sons, Ltd.