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  1 - An Uncertain Time Horizon Inventory Management Model with Partial Backlogging Considering Deterioration Cost
  Sara Nodoust Aboulfazl Mirzazadeh
  A new mathematical model for the optimal production isformulated for the inventory management system under time-varyingand stochastic inflation environment for deteriorating items. The timehorizon is finite and demand rate is dependent to the inflation. In thereal situa أکثر

  A new mathematical model for the optimal production isformulated for the inventory management system under time-varyingand stochastic inflation environment for deteriorating items. The timehorizon is finite and demand rate is dependent to the inflation. In thereal situation, some but not all customers will wait for backlogged itemsduring a shortage period, such as for fashionable commodities or hightechproducts with the short product life cycle. The longer the waitingtime is, the smaller the backlogging rate would be. According tosuch phenomenon, taking the backlogging rate into account is necessary.Thus, the model incorporates partial backlogging. The total systemcost including deterioration cost, production cost, inventory holdingcost, backordering cost, lost sale cost and ordering cost is formulated asan optimal control problem. The numerical example has been providedfor evaluation and validation of the theoretical results. تفاصيل المقالة
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  2 - Human Resource Planning by Using Markov Chains: Case Study of Islamic Azad University-Firouzkouh Branch
  ملیحه صحرایی
  This paper aims to predict and determine the net supply of manpower in Islamic Azad University - Firouzkouh Branch of for a specific period of time. For this purpose, Markov chain model is used to analyze human resources data obtained previously. At last, the number of أکثر

  This paper aims to predict and determine the net supply of manpower in Islamic Azad University - Firouzkouh Branch of for a specific period of time. For this purpose, Markov chain model is used to analyze human resources data obtained previously. At last, the number of labors, arrivals, departures, shortages and also surpluses of each unit will be predicted for the next 5 years during 2011-2015 in different departments and positions. It will provide managers with a clear image of the resources situation to make decision in terms of the promotion, reduction, transfer, and recruitment of the staff. All existing information about statistical population is applied in this contribution. تفاصيل المقالة
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  3 - A credit policy approach in a two-warehouse inventory model for deteriorating items with price- and stock-dependent demand under partial backlogging
  Gobinda Chandra Panda Md. Al-Amin Khan Ali Akbar Shaikh
  Advertisement of the product is an important factor in inventory analysis. Also, price and stock have an important role to attract more customers in the competitive business situations. Trade credit policy is another important role in inventory analysis. We have combine أکثر

  Advertisement of the product is an important factor in inventory analysis. Also, price and stock have an important role to attract more customers in the competitive business situations. Trade credit policy is another important role in inventory analysis. We have combined these three factors together in a two-warehouse inventory model and represented it mathematically. In addition, we have added deteriorating factor of our proposed problem with price- and stock-dependent demand under partial backlogged shortage and solved. The frequency of advertisement is considered constant for a year in this paper. The proposed model is highly nonlinear in nature. Due to highly nonlinearity, we could not find the closed form solution. In this paper, trade credit facility is taken in the perspective of retailer, and all the possible cases and subcases of the model are discussed and solved using lingo 10.0 software. The results of sensitivity analysis prove the effectiveness of the proposed model. تفاصيل المقالة
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  4 - Purchasing Inventory Models for Deteriorating Items with Linear Demand and Shortages - in Third Order Equation
  Sivashankari C.K.
  In this paper, an purchasing inventory model for deteriorating items is developed with a linear, positive trend in demand, allowing inventory shortages and backlogging. It is assumed that the goods in the inventory deteriorate over time at a constant rate . Two models a أکثر

  In this paper, an purchasing inventory model for deteriorating items is developed with a linear, positive trend in demand, allowing inventory shortages and backlogging. It is assumed that the goods in the inventory deteriorate over time at a constant rate . Two models are developed for two operational policies. The first policy covers the case that the inventory model with linear demand for deteriorative items and the second policy covers the case that the inventory model with linear demand for deteriorative items and shortages. Mathematical model is developed for each model to reduce the third order equation and the optimal cycle time and inventory lot size which minimizes the total cost is derived. Illustrative example is provided for each model. In each model, sensitivity analysis is performed to show how the optimal values of the policy variables in the model change as various model parameters are changed. The validation of result in this model was coded in Microsoft Visual Basic 6.0 تفاصيل المقالة
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  5 - PRODUCTION INVENTORY MODEL FOR DETERIORATING ITEMS WITH SHORTAGES AND SALVAGE VALUE UNDER REVERSE LOGISTICS
  V. Kumar Mishra
  In this paper, a production inventory model is developed for the business enterprise which consists of three wings. The first wing is for manufacturing new items, the second wing is for collecting the returned items, while third wing is for remanufacturing the returned أکثر

  In this paper, a production inventory model is developed for the business enterprise which consists of three wings. The first wing is for manufacturing new items, the second wing is for collecting the returned items, while third wing is for remanufacturing the returned item. In this model we consider the fact that the storage item is deteriorated during storage periods and salvage value is incorporated to the deteriorated items. The demand, deterioration, production, remanufacturing and return rates are time dependent. The shortages are allowed and fully backlogged. The model is solved analytically by minimizing the total inventory cost. The model can be applied for optimizing the total inventory cost of deteriorating items inventory under reverse logistic for a business enterprise where demand and deterioration both is function of time. تفاصيل المقالة