In this paper a system consisting of two subsystems A and B is analyzed. A has only one unit while B has two units, B 1 and B 2, connected in such a manner that B 2 is in hot standby with B 1. The system is modelled by a marked point process. There are two repairmen namely a supervisor and a...

In this paper we evaluate the learnability of the virtual classroom Stochastikon Magister [International Journal of Emerging Technologies in Learning (iJET) 4: 52–57, 2009, International Journal of Emerging Technologies in Learning (iJET) 4: 44–50, 2009] by comparing the examination scores...

In this paper some reliability concepts in the telescopic family of distributions are compared. The telescopic family is named after the telescopic series in mathematics and represents an interesting class of discrete life time distributions. The telescopic family is introduced and also some...

This paper deals with the estimation of reliability of either parallel or series systems with two components. We assume that the strengths of the components follow a bivariate Rayleigh distribution. The two components are subjected to either two independent stresses or a common stress which are...

Acceptance sampling plans by attributes involving sampling from the binomial distribution and the process average fraction nonconforming following a beta distribution are termed as Polya sampling plans. An iterative procedure of finding the parameters of a single sampling plan by attributes...

A cumulative sum (CUSUM) control chart referred to as the SS-CUSUM chart is proposed that is capable of simultaneously detecting changes in both mean and standard deviation. The construction of this chart is based on the sum of squares of the maximum standard CUSUM statistics. The average run...

The standard multivariate control chart usually employs fixed sample size at fixed sampling interval (FSI) to monitor a process. In this study, a multivariate exponentially weighted moving average (MEWMA) chart with variable sampling intervals (VSI) is investigated. The MEWMA chart with VSI...

In many practical situations, we observe that the residual life gets independent of age after some shift. For example, at the of operation the life time of a component cannot be described sufficiently well by an exponential distribution as many internal sources of failure are existing. However,...

In this article following the approach of Lorenzen and Vance, an economic design of moving average control chart is developed for ceased as well for continued production during control actions. The performance of the control charts is compared for the two production modes by means of the loss...

In this paper we introduce a new class of life distribution called the new better (worse) than used renewal failure rate at specified time t 0 NBURFR-t 0 (NWURFR-t 0). Some closure properties, such as closure under convolution, arbitrary and general mixture, and Shock model are discussed....