nowadays, by successful application of on time production concept in other concepts like production management and storage, the need to complete the processing of jobs in their delivery time is considered a key issue in industrial environments. unrelated parallel machines scheduling is a general mood of classic problems of parallel machines. in some of the applications of unrelated parallel mac...

In this paper we describe G/G/R+s multi- repairmen machining system with balking. The system consists of M operating machines, S spare machines, R permanent and s additional repairmen. Assuming the discrete flow of machines by continuous one, the diffusion approximation technique for the machine repair system has developed. The system will be in normal working mode if there is M operating machi...

maintenance process is one of the most necessary processes in every organization, whose main task is maintaining machines in desired conditions or restoring machines from non-optimal (nonoperational)conditions to optimal (operational) conditions. machines failure would result in loss of machines availability time, and rise of both organization costs and production time. also, it may cause irrep...

Positive and negative side effects of economic activities—“externalities” in the language of economists—are universal in the energy sector. Coal-fired power plants not only produce electricity, but also CO2, which contributes to global warming, and local air pollutants such as sulfur dioxide (SO2), which have adverse health effects on the population living downwind of the smoke stacks. The stud...

It has long been known in the economics literature that selling different goods in a single bundle can significantly increase revenue, even when the valuations for the goods are independent. However, bundling is no longer profitable if the goods have high production costs. To overcome this issue, we introduce pure bundling with disposal for cost (PBDC), where after buying the bundle, we allow t...

Corporate Social Responsibility (CSR) is very prominent on the corporate agenda. Our research examines the individual-level dynamics of how a brand’s social initiatives can generate relationship marketing benefits. We find that positive CSR beliefs strengthen consumers’ relationships with the brand, generating benefits for the brand such as greater likelihood of purchase, increased loyalty, and...

Web 2.0 has allowed online shoppers to become not just information seekers but also information providers. Many e-commerce venues allow users to share their experiences in the form of textual product reviews. While textual product reviews represent a wealth of information for candidate buyers, finding pertinent information becomes difficult, as the number of reviews for a particular product bec...

Many companies have gained great benefit from a speed-to-market program. Others have tried but failed to achieve measurable, sustained value. Still others have not even tried, being concerned about adverse consequences. This article helps newcomers decide how to approach time to market. It first addresses some common fears about development acceleration, such as increased project expense and la...