This paper proposes a heuristic method based on adjusted weighted standard deviation for constructing R chart for skewed process distributions. The asymmetric control limits of the chart are ...

Control limits, how do they work? Is it a probability limit? Is it an economic limit? Read on to find out! Overview: What Are Control Limits? A control chart consists of several parts. It has two ...

We evaluate control chart combinations using the expected detection time for the various types of process changes and a quadratic loss function. When a signal is generated, it is important to know ...