the effective factors on the economic growth of iran during the first 5-year development plan are studied. the main characteristics of this period are that the first development plan began after the end of war during which some of the unused capacities of the war period were utilized. while the budget deficit was continued in this period the government also pursued policies such as devaluation ...

In this article, an imperfect vendor–buyer inventory system with stochastic demand, process quality control and learning in production is investigated. It is assumed that there are learning in production and investment for process quality improvement at the vendor’s end, and lot-size dependent lead-time at the buyer’s end. The lead-time for the first batch and those for the rest of the batches ...

In this paper we present a finite horizon single product single machine production problem. Demand rate and all the cost patterns do not change over time. However, end of horizon effects may require production rate adjustments at the beginning of each cycle. It is found that no such adjustments are required. The machine should be operated either at minimum speed (i.e. production rate = demand r...

Although the lately evolved manufacturing technologies such as enterprise resource planning (ERP) provide a uni&ed platform for managing and integrating core business processes within a &rm, the decision-making between marketing and production planning still remains rather disjoint. It is due in large parts to the inherent weaknesses of ERP such as the &xed and static parameter settings and unc...

abstract: central banks have long been interested in obtaining precise estimations of money demand given the fact that the evolution of money demand plays a key role over several monetary variables. one implication of currency substitution is that the exchange rate could serve as another determinant of the demand for money. due to the recent currency crisis in iran, it would be important to inv...

The mathematical modeling of reverse logistics inventory systems ignores the fact that returned items may arrive out sequence, i.e., with different number remanufacturing times. Moreover, such assumes retuned retain same quality upon recovery regardless how many times they have been previously remanufactured. This paper develops a new expression percentage can be remanufactured finite proposed ...