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Articles by Yung-Fu Huang
Total Records ( 15 ) for Yung-Fu Huang
  Yung-Fu Huang , Kuang-Hua Hsu , Po-Shun Chen and Shih-Hao Dong
  Human resource has become more important in businesses that a lot of supervisors have perceived the establishment of performance evaluation standard. It is a wisdom that the situation has become even more apparently in the case company. From previous valuations, T company still needs improvement on the systems, like human resource in practice. For this reason, the study aims to (1) develop a suitable valuation model for the Occupational Safety Section in T company, select an appropriate human resource valuation index and classify the index with the characters, (2) propose various weights and sequences for T company with Analytic Hierarchy Process (AHP) and (3) apply the model with motivational pattern to promote the work motivations and desires to remain of employees. The findings show (1) to provide the valuation index of the Occupational Safety Section in T company with an appropriate weight, (2) that, with the valuation, the performance evaluation is the product of original performance and performance index, showing that the results are flexible and objective and (3) the model collocating Weighted in Points can provide T company with methods to encourage employees with better performance and increase work incentives.
  Yung-Fu Huang
  The present study was carried out to investigate Goyal`s model (1985) and Teng`s model (2002) using the algebraic method to determine the optimal cycle time under delay payments. This paper provides algebraic approach that must be considered as a pedagogical advantage for explaining the inventory concept to students that lack knowledge of derivatives. This algebraic approach could therefore be used easily to introduce the basic inventory theories to younger students who lack the knowledge of calculus.
  Yung-Fu Huang
  In 1985, Goyal investigated the inventory problem under permissible delay in payments independent of the order quantity. In the present study, the restrictive assumption of the trade credit independent of the order quantity is relaxed. The present study investigates the retailer`s inventory problem under permissible delay in payments dependent of the order quantity within the economic order quantity (EOQ) framework. In addition, we adopt the algebraic method to determine the retailer`s optimal ordering policy under minimizing the annual total relevant cost was adopted. Then, two theorems are developed to efficiently determine the optimal cycle time and optimal order quantity for the retailer. Finally, numerical examples are given to illustrate these theorems obtained in the present study.
  Yung-Fu Huang
  In present study, the model of Huang has been modified and discussed with retailer`s ordering policy under conditions of cash discount and trade credit. Mathematical model has been modified for obtaining the optimal cycle time and optimal payment policy for item under cash discount and trade credit so that the annual total cost is minimized. Then, a theorem is provided to efficiently determine the optimal cycle time and optimal payment policy. Finally, a numerical example is solved to illustrate the results obtained.
  Yung-Fu Huang
  This study investigate the retailer’s optimal cycle time and optimal payment time under supplier’s trade credit policy and cash discount policy. Mathematical models have been derived for obtaining the optimal cycle time and optimal payment policy for item under supplier’s trade credit and cash discount so that the annual total relevant cost is minimized. Furthermore, numerical examples have given to illustrate the results developed in this study and a lot of managerial insights have obtained.
  Yung-Fu Huang and Ying-Shiou Lin
  This study tries to investigate the retailer`s optimal replenishment policy under permissible delay in payments and cash discount within the EPQ framework. Mathematical models have been derived for obtaining the optimal cycle time for item so that the annual total relevant cost is minimized. Furthermore, numerical examples are given to illustrate the results developed in this study.
  Chung-Li Chou , Yung-Fu Huang and Hung-Fu Huang
  The present study investigate the retailer’s optimal cycle time and optimal payment time under supplier credits including conditionally permissible delay in payments and cash discount depending on retailer payment time. That is, the retailer can obtain fully permissible delay in payments and cash discount if the payment is paid before the period of full delay payments permitted by the supplier. Otherwise, the retailer will just obtain partially permissible delay in payments within the period of partial delay payments permitted by the supplier. The supplier uses this policy to attract retailer to pay the payment as soon as possible to shorten its collection period. Mathematical models have been derived for obtaining the optimal cycle time and optimal payment time for item so that the annual total relevant cost is minimized. One theorem is developed to efficiently determine the optimal replenishment and payment policy for the retailer.
  Yung-Fu Huang
  In this study the restrictive assumptions of the trade credit independent of the order quantity and the retailer’s unit selling price equaled to the purchasing price per unit are relaxed to fit real business situations. This study investigates the retailer’s inventory problem under trade credit dependent of the order quantity and the retailer’s unit selling price not necessarily equals to the purchasing price per unit within the Economic Order Quantity (EOQ) framework. In addition, we adopt the algebraic procedure to determine the retailer’s optimal ordering policy under minimizing the annual total variable cost. This algebraic approach could therefore be used easily to introduce the basic inventory theories to younger students who lack the knowledge of calculus. Then, two theorems are developed to efficiently determine the optimal cycle time and optimal order quantity for the retailer. Finally, numerical examples are given to illustrate these theorems and obtain a lot of managerial insights.
  Yung-Fu Huang and Chih-Sung Lai
  This research tries to deal with the retailer`s lot-sizing problem under two warehouses and two levels of delay permitted using algebraic method. In addition, we develop easy-to-use procedures to find the optimal lot-sizing policy for the retailer under minimizing annual total relevant cost. This study provides this algebraic approach that could be used easily to introduce the basic inventory theories to younger students who lack the knowledge of calculus. Furthermore, we develop three easy-to-use theorems to efficiently determine the optimal cycle time and optimal lot sizing for the retailer. Finally, a numerical example is given to illustrate these theorems obtained in this study. In addition, we obtain a lot of managerial insights from this numerical example.
  Yung-Fu Huang and Kuang-Hua Hsu
  The purpose of this research is to relax this assumption and establish the retailer’s inventory system as a cost minimization problem to determine the retailer’s optimal inventory cycle time. Then, an algebraic approach is provided and an easy-to-use theorem is derived to efficiently determine the optimal cycle time. From the final numerical examples, result implies that the retailer will order less quantity to take the benefits of the permissible delay in payments more frequently when the larger the differences between the unit selling price per item and the unit purchasing price per item.
  Kuang-Hua Hsu , Hung-Fu Huang , Yu-Cheng Tu and Yung-Fu Huang
  In the previous related studies, the inventory replenishment problems under permissible delay in payments are independent of the order quantity. In this study, the restrictive assumption of the trade credit independent of the order quantity is relaxed. This study discusses the inventory policies under permissible delay in payments when a larger order quantity.
  Yu-Cheng Tu , Kuang-Hua Hsu and Yung-Fu Huang
  In this study, the restrictive assumptions of the trade credit period independent of the order quantity and the retailer`s unit selling price equaled to the purchasing price per unit are relaxed to fit real business situations. In 1985, Goyal considered the retailer`s inventory replenishment problem under trade credit period independent of the order quantity and the retailer`s unit selling price and the purchasing price per unit were equal. This article investigates the retailer`s inventory problem under trade credit period dependent of the order quantity and the retailer`s unit selling price not necessarily equals to the purchasing price per unit within the Economic Order Quantity (EOQ) framework. In addition, we use an easy and simple arithmetic-geometric mean inequality approach to determine the retailer`s optimal ordering policy under minimizing the annual total relevant cost. This approach could therefore be used easily to introduce the basic inventory theories to younger students who lack the knowledge of calculus. Finally, numerical examples are given to illustrate the proposed model and its optimal solution.
  Wen-Kuang Yang , Hung-Fu Huang , Yu-Cheng Tu and Yung-Fu Huang
  The main purpose of this study is to investigate the retailer’s inventory policy under two-level delay permitted to reflect the supply chain management situation. In this study, we assume that the retailer maintains a powerful position. So, it is assumed that the retailer can obtain the full trade credit offered by the supplier yet the retailer just offers the partial trade credit to his customers. Under these conditions, the retailer can obtain the most benefits. Then, an algebraic approach is provided to investigate the retailer’s inventory system as a cost minimization problem to determine the retailer’s optimal inventory policy under the supply chain management. One ease-to-use theorem is developed to efficiently determine the optimal inventory policy for the retailer. Finally, numerical examples are given to illustrate the theorem.
  Yung-Fu Huang
  The present note studied the effect of random defective rate and imperfect rework process on the Economic Production Quantity (EPQ) model. They demonstrate that the optimal lot size can be solved algebraically and the expected inventory cost can be derived immediately as well. In this note, we will offer a simple algebraic approach to replace their algebraic skill to find the optimal solution under the expected annual cost minimized.
  Jyh-Rong Chang , Yung-Fu Huang and Hung-Fu Huang
  This note deals with the optimal lot sizing decision at the technology selection stage, and modifies the optimal solution procedure in constant demand case described in Khouja (Omega 2005, 33, 47-53). This note develops an alternative approach to find the optimal lot sizing to improve the study of Khouja (Omega 2005, 33, 47-53). Finally, numerical examples are given to illustrate the result discussed in this study.
 
 
 
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