Purpose: The purpose of this paper is to develop a cost model by the variable sampling interval and optimization of the average cost per unit of time. The paper considers an economic–statistical design of the X̅ control charts under the Burr shock model and multiple assignable causes were...

Purpose: The purpose of this paper is to develop an economic statistical design based on the concepts of adjusted average time to signal (AATS) andANFfor<m:math xmlns:m="http://www.w3.org/1998/Math/MathML"><m:mover accent="true"><m:mi>X</m:mi><m:mo>¯</m:mo></m:mover></m:math>control chart under a Weibull shock model with multiple assignable causes. Design/methodology/approach: The design used in this study is...

Recent studies have shown that using variable sampling size and control limits (VSSC) schemes result in charts with more statistical power than variable sampling size (VSS) when detecting small to moderate shifts in the process mean vector. This paper presents an economic-statistical design...