NDT Based Process Monitoring and Control

Ndt Based Process Monitoring and Control

The old focus on using automation was simply to increase productivity and reduce costs. Today, global competition is forcing manufacturers not only to contain costs but also to improve quality of products and processes. Thus, the purpose of automation has shifted to broader issues. Highly automated processes ensure high quality on a constant level. But, increasing the degree of automation also ...

A Review and Evaluation of Statistical Process Control Methods in Monitoring Process Mean and Variance Simultaneously

In this paper, first the available single charting methods, which have been proposed to detect simultaneous shifts in a single process mean and variance, are reviewed. Then, by designing proper simulation studies these methods are evaluated in terms of in-control and out-ofcontrol average run length criteria (ARL). The results of these simulation experiments show that the EWMA and EWMS methods ...

Quality Control and NDT

a review and evaluation of statistical process control methods in monitoring process mean and variance simultaneously

in this paper, first the available single charting methods, which have been proposed to detect simultaneous shifts in a single process mean and variance, are reviewed. then, by designing proper simulation studies these methods are evaluated in terms of in-control and out-ofcontrol average run length criteria (arl). the results of these simulation experiments show that the ewma and ewms methods ...

One-class classification-based control charts for multivariate process monitoring

One-class classification problems have attracted a great deal of attention from various disciplines. In the present study, we attempt to extend the scope of application of the one-class classification technique to statistical process control (SPC) problems. We propose new multivariate control charts that apply the effectiveness of one-class classification to improvement of Phase I and Phase II ...