On 27 May 2005 the Draft International Standard ISO/DIS 2210: Milk and milk products - Sampling - Inspection by variables in the presence of measurement error was released. It is a so-called statistical standard aiming at deciding upon acceptance or rejection of incoming lots consisting of milk...

Statistical tools are believed to be essential for competent quality judgements in the field of nuclear technology as well as in other branches of industry. In comprehensive quality management, these tools comprise not only well-known statistical procedures of quality control for fuel assembly...

A mine having five quarries needs at least 10 tippers out of 17 to be in running condition for a particular shift. However, with the poor availability of the tippers, the production was hampered. Substantial improvement of availability and utilisation of tippers under the existing infrastructure...

In this paper the use of Collani's statistic for monitoring simultaneously process mean and process variance is investigated by a comparison with the more popular chart and chart, respectively. The comparison is performed by means of an economic design of the charts assuming two different...

Using a counter example, we show that the formula for computing the Average Run Lengths (ARL) of a moving average control chart (MA) in Wetherill and Brown (1991) is incorrect. However, we conjecture that the formula may provide an upper bound for the ARL of a moving average control chart.

In a strength-stress interference model, we are interested in estimating the structural reliability of a system. Here we present Bayesian procedures to estimate the structural reliability and other relevant parameters when covariates are incorporated in the model. Numerical examples illustrate...

Recently, Ohta et al. [Quality and Reliability Engineering International 17: 439-446, 2001] have studied the economic design of CCC(Cumulative Count of Conforming)-r charts for high-yield processes assuming a fixed hazard rate. Generally, however, the hazard rate is varying over time. With the...

Most maintenance models assume perfect maintenance, where a system becomes as good as new after each maintenance action. However, in reality system's performance deteriorates over time. This work investigates a system's performance when subjected to failures which are imperfectly repaired. Two...