This article proposes a hybrid economic group acceptance sampling plan for a truncated life test when the life time of the items follows an exponential distribution. For specified consumer's risk, test truncated time and group size, the minimum number of testers and acceptance number are...

This study focuses on modeling the reliability of systems with multiple failure modes and imperfect repairs. Times to failure are exponentially distributed and repair times follow general distributions. Closed expressions are obtained for the steady state availability and Laplace transforms of...

In this article, a skewness parameter to a gamma distribution is introduced using an idea of Azzalini, which creates a new class of weighted gamma distributions. This new distribution has a probability density function with skewness representing a general case of weighted probability density...

In this paper we consider the exponentiated modified Weibull distribution. The modified Weibull distribution, Weibull distribution and the exponentiated exponential distribution are found to be particular cases of this family. We derive the analytical shape of the corresponding density functions...

In this paper the effect of truncation and measurement error on the operating characteristic (OC) and the average sample number (ASN) functions of a sequential test for the mean of the parent population with known variance is investigated.

Economic reliability group acceptance sampling plans are developed assuming that the lifetime of a submitted product follows the inverse-Rayleigh or log-logistic distribution. For various acceptance numbers, sample size and producer's risks, plans with minimum experimental time are obtained that...

From 1st January 2010 the member states of the EU must guarantee effective product surveillance of their markets. According to the summary of Act No 765/2008 they are required to organise and carry out close monitoring so that the products covered by Community harmonisation legislation meet the...

Moments of order statistics and an ordered sample are used to define a test statistic for the null hypothesis that the considered random variable has half logistic distribution. The percentiles of the test statistic are evaluated and the power of the test is computed. The developed statistic is...

This article investigates the quality loss index QLI proposed by Samajdwar et al. for normal variables. The probability distribution of QLI and its components are obtained. The first component represents a quality loss index for the process variability, while the second component represents a...

Control charts are widely used in statistical process control to detect changes in a production process and for monitoring a process to make sure that it is in control. In conventional statistical process control, the pattern of chance causes is often assumed to follow normal distribution. It is...