Normality is a common assumption for many quality control charts. One should expect misleading results once this assumption is violated. In order to avoid this pitfall, we need to evaluate this assumption prior to the use of control charts which require normality assumption. However, in certain cases either this assumption is overlooked or it is hard to check. Robust control charts and bootstra...

Process control charts are proven techniques for improving quality. Specifying the control limits is the most important step in designing a control chart. The presence of outliers may extremely affect the estimates of parameters using classical methods. Robust estimators which are not affected by outliers or the small departures from the model assumptions are applied in this paper to specify th...

Although it is well known that the performance of attribute control charts decreases significantly when assumption process parameters invalid, this prevalent in pertinent literature. However, most practical applications, have to be estimated from a finite in-control Phase I sample, and therefore should evaluated perspective parameters. In paper, we compare run length properties hypergeometric n...

Assuming a first-order auto-regressive model for the auto-correlation structure between observations, in this paper, a transformation method is first employed to eliminate the effect of auto-correlation. Then, a maximum likelihood estimator (MLE) of a step change in the parameters of the transformed model is derived and three separate EWMA control charts are used to monitor the parameters of th...

Background Nonyl phenol (NP) is a degradation product of nonylphenol polyethoxylates, which are widely used in the production of industrial and consumer surfactants. NP a Kind of environmental chemical, is thought to imitate endogenous hormones, inhibit the actions of hormones, and induce reproductive abnormalities. In this study, evaluation of Nonyl phenol toxic effects on reproductive system ...

A specialized transition network mechanism, the interruptable transition network (ITN) is used to perform the last of three stages in a multiprocessor syntactic parser. This approach can be seen as an exercise in implementing a parsing procedure of the active chart parser family. Most of the ATN parser implementations use the left-to-right top-down chronological backtracking control structure (...