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! A control chart consists of several parts. It has two limits. The bottom dashed line is ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...