Acceptance control charts are effective tools tomonitor capable processes in which the fraction of the produced nonconforming items is very low. In these charts, some controlled changes in the process mean are allowed, and the production of a specified number of defectives is tolerated. Designing these acceptance control charts by considering the cost of sampling, detecting, and investigating o...

Multivariate cumulative sum (MCUSUM) control charts are widely used in industry because they are powerful and easy to use. They cumulate recent process data to quickly detect out-of-control situations. MCUSUM procedures will usually give tighter process control than classical quality control charts. A MCUSUM signal does not mean that the process is producting bad product. Rather it means that a...

Cumulative sum (CUSUM) and exponentially weighted moving average (EWMA) control charts are commonly used to detect small changes in the parameters of production processes. Recently, a new control structure was introduced, named as mixed EWMA–CUSUM control chart, which combined both charts. The current study provides a detailed comparison of these three types of control charts when the process p...

This working paper series is intended to facilitate discussion and encourage the exchange of ideas. Inclusion here does not preclude publication elsewhere. It is the original work of the author(s) and subject to copyright regulations. ABSTRACT We believe that conflicting decision signals resulting from examining Shewhart Mean and Variability Control Charts produce undesirable consequences. Ther...

Chemical processes as well many non-industrial exhibit autocorrelation, for which the above-mentioned control procedures are not suitable. This paper considers problem of monitoring a process in observations can be represented first-order autoregressive model following heavy tailed distribution. It also presents practical usage time series charts on chemical concentrations. The second part disc...

This paper presents a quality control tool, that is, method, which in this case concernsthe mechanical processing of wood, but general, it can be implemented any form production (mechanicalengineering, traffic, food technology...). The goal the research is to show way applying chartmethod, determine stability technological process wood order beable define appropriate corrective measures improve...