In this paper a redundancy allocation problem is studied where for the first time the supplier selection is taken into consideration and redundant components are provided from appropriate suppliers with the most suitable offers such as discount on buying price of components, warranty length for components, things like that, so that the system reliability, profit and the warranty length proposed...

For repairable items under the two-dimensional warranty, the manufacturer expenses warranty costs for rectifying the failures occurring over the warranty coverage. Preventive maintenance actions reduce the occurrence intensity of item failures, and hence the warranty cost resulted from corrective maintenance, but bring additional preventive maintenance cost. In this paper, we investigate a peri...

objective(s): to investigate the association of single nucleotide polymorphisms (snps) in the peroxisome proliferator-activated receptors gamma (pparg) with essential hypertension (eh) and additional role of gene– high-density lipoprotein cholesterol (hdl) interaction. materials and methods:a total of 1640 patients with eh (806 males, 834 females), with a mean age of 52.5±12.6 years, were selec...

Many services products are installed in a complex system that is operated only when the entire system is completed. The time from their installation to commissioning, called a dormant state in this paper, may take several years for systems such as complete buildings or aircraft. Warranties for the products may cover the time starting from their installation to a certain time. Warranty cost on r...

In this paper, we present an optimal burn-in model for repairable assembly products (RAP) sold under warranty. The general repairable products, sold under warranty and optimal burn-in model by Sheu (2004) are further extended to the case in which the probability of type II failure is independent for a parent item. This paper investigates a parent item (product or system) made up of two items (s...

Pro-environment policies require public support and engagement, but in countries such as the USA, public support for pro-environment policies remains low. Increasing public scientific literacy is unlikely to solve this, because increased scientific literacy does not guarantee increased acceptance of critical environmental issues (e.g. that climate change is occurring). We distinguish between sc...

Employing remanufactured and refurbished products are among the new strategies that companies used to raise their profits as well as protects environment. Although used product equipment gives an opportunity to purchase latest technology, customers are doubtful about quality and reliability of these products. Because of limitation that developing countries faces in buying new products, some cou...