Nowadays, getting new markets depends on customer satisfaction. Quality is the most
important factor in customer satisfaction. Quality in production includes understanding the …

Reliability assurance refers to a series of activities to ensure that the final product reliability
meets the design specifications during the life cycle. However, most reliability assurance …

In high-quality processes, events related to non-quality rarely occur and the times between
these events (TBE) is likely to follow a skewed distribution like the gamma distribution. In …

To improve the detecting abilities of upward and downward parameter changes in high‐
quality process, two combined schemes by integrating memory‐type, that is, exponentially …

The reliability of products can be affected by the quality errors which may occur during the
production process. Product reliability decreases when the rate of manufactured products …

Control charts are commonly used to monitor a process to detect undesirable changes. The
main goal of this work is to propose exponentially weighted moving average (EWMA) and …

The current maintenance mode of the subway vehicle traction system does not consider the
change of failure rate in the operation of components, and there is an unreasonable …

The geometric process is one of the important simple monotonic processes with a positive
ratio parameter in the theory of stochastic processes. Simply, it can be thought of as a …

Time Between Events (TBE) charts have advantages over the traditional control charts when
monitoring high quality processes with very low defect rates. This article introduces a new …

This study discusses Shewhart control charts to monitor the mean of non-normally
distributed data using extensive Monte Carlo simulations. In particular, Weibull, exponential …