In 1986 Taguchi presented the quadratic function for describing the loss of quality due to deviation from the production value. The objective then is to improve quality by minimizing the quadratic loss function which reflects the loss of both, the producer and the consumer. Subsequently, Kapur...

Consider the following two situations which are characteristic for the application of statistical procedures.

In this article, we survey the developments with respect to generalized models of repairable systems during the 1990s, particularly for the last five years. In this field, we notice the sharp fundamental problem that voluminous and complicated models are proposed without sufficient evidence (or...

The average probability of acceptance (APA) is obtained for a single sampling plan assuming a Gamma prior distribution. Formula for inflection point and tangent at the inflection point are also derived. Tables are provided for selection of plan parameters.

In this paper, we extend Johnson's work [Johnson, T. Journal of Quality Technology 24: 211-215, 1992] of formulating the relationship between process capability indices (PCI) and expected squared error losses. Moreover, a comparison is made between the expected squared error loss of PCI under...

In this paper we present a mathematical model of a generic manufacturing system. The quality of the manufactured product is captured through one or more of its critical design/process parameters. Managers often face the dilemma of which product/process is to be singled out for improvement in...

For deriving the steady state probabilities and the availability of K-out-of-N:G systems with constant failure rate and general repairs an imbedded Markov chain at repair completion epochs is used. The special cases of constant repair time, Coxian-2 and Erlang-2 repair time distributions are...

Consider a product with quality characteristic X. Assume that the product is composed of n parts each with quality characteristic Xi , and and let

PISA stands for “Programme for International Student Assessment” performed, by the OECD and consisting of a cyclic evaluation of the new generations' basic competences. The first evaluation took place in 2000 and the results were published on 4 December 2001. According to the official...