This paper presents novel approaches for generating sequencing rules for the car sequencing (CS) problem in cases of two and multiple processing times per station. The CS problem decides on the succession of different car models launched down a mixed-model assembly line. It aims to avoid work overloads at the stations of the line by applying so-called sequencing rules, which restrict the maximu...

Profile monitoring is a relatively new technique in quality control used when the product or process quality is best represented by a profile (or a curve) at each time period. The essential idea is often to model the profile via some parametric method and then monitor the estimated parameters over time to determine if there have been changes in the profiles. Previous modeling methods have not i...

The authors are to be congratulated for an interesting paper which highlights the need for more formal procedures on the assessment of goodness of fit in the area of mixed models. The authors give a comprehensive overview of diagnostic techniques and goodness-of-fit tests for random effects in mixed models and propose a number of new nonparametric tests with omnibus character. Some of them are ...

It is shown that a method of robust estimation in a two way crossed classification mixed model, recently proposed by Bednarski and Zontek (1996), can be extended to a more general case of variance components model with commutative a covariance matrices.

In this article the analysis of experiment of repeated measures design is considered which is used often in different fields of studies. In order to analyze the experiment of repeated measures design efficiently we need to select the suitable covariance structure which required a lot of efforts. In the current paper an approach is used to guide the selection of the covariance structure for the ...

After estimation of e3ects from a linear mixed model, it is often useful to form predicted values for certain factor/variate combinations. This process has been well-de5ned for linear models, but the introduction of random e3ects means that a decision has to be made about the inclusion or exclusion of random model terms from the predictions, including the residual error. For spatially correlate...

In studies on prospective time perception, a prolonging effect of arousal on time estimates is commonly reported for durations under 2s while the effect vanishes for longer intervals. In this study, we investigated how arousal and pleasure induced by aural stimuli varying in volume and valence influenced reproductions in the range from 1.1s to 5s. As expected, higher arousal was associated with...

The GLM procedure has been the workhorse for mixed model applications in the SAS® System. Other procedures, including NESTED and VARCOMP, are used for specific applications. Since its introduction in 1976, GLM has been enhanced with several mixed model facilities such as the RANDOM and REPEATED statements. However, there are aspects of certain models that none of these facilities fully accommod...

Recent changes in higher education, especially associated with its massification, have led to calls for more accountability and to an increasing need to evaluate universities' performance. However, comparing universities with different subject mixes poses some significant problems. In this article, a linear mixed effect model methodology allowing for random effects at university level is used t...