Control chart techniques have been widely used in industries to monitor a process in quality improvement. Whenever we deal with variables data, we usually employ a combination of X-bar chart and R chart (or S chart) to monitor both the center and the spread of the process. In this paper, we propose a simple alternative, that is, we design a single chart to monitor both the center and the spread...

abstract. in recent years several studies have shown that  control charts with adaptive schemes or double sampling plans detect both small and moderate shifts in the process mean more quickly than the traditional shewhart  chart. in the classical double sampling  chart, the difference between two points were placed in the central region of first stage was not considered. in this study, a new co...

in recent years, the studies of location play a key role in success and stability of economic activities. location studies are under consideration in both national and international levels. meanwhile, identification of goals and methods of solving location problems have significant importance. the purpose of this paper is to examine spatial distribution of economic activities in 14 zones of esf...

We study two-player one-dimensional discrete Hotelling pure location games assuming that demand f ( d ) as a function of distance is constant or strictly decreasing. show this game admits best-response potential. This result holds in particular for = w with 0 < ? 1. For case special attention will be given to the structure equilibrium set and conjecture about increasingness correspondences m...

Abstract We study an N -player game where a pure action of each player is to select nonnegative function on Polish space supporting finite diffuse measure, subject constraint the integral function. This used define intensity Poisson point process space. The processes are independent over players, and value measure union her open Voronoi cells in superposition process. Under randomized strategie...