Browsing by Author "Nababan, T. P."

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    MENYELESAIKAN PERSOALAN OPTIMISASI TERPADU UNTUK PERSOALAN TRANSPORTASI DAN PERSOALAN INVENTORI
    (2013-03-26) Ningrum, Karinda Puspita; Nababan, T. P.; Sukamto
    We discussed the integrated optimization problem which is closely related to the issue of inventory and transportation problems. An alternative model called the model ITIO (Inventory-Transportation Integrated Optimization) will be used to solve the optimization problem of integrated inventory and transportation. Here we review the work done by Huanco Tang, Lixin Tian and Lin Jia International Journal of Nonlinear Science. 1 (8), 92-96 (2009) for a single product optimization problem
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    MODEL INVENTORI TINGKAT PERMINTAAN LINEAR, TINGKAT PRODUKSI TERBATAS DAN KEKURANGAN PERSEDIAAN YANG DIPENUHI SAAT PRODUKSI
    (2013-03-26) H, Roni Hasudungan; Nababan, T. P.; Lily, Endang
    This paper discussed about the formulation of the total cost of the average inventory on inventory models using linear functions, where the levels of demand and production are limited. In the model inventory, total cost of the average inventory was obtained from the derivatives of inventory model for time intervals to obtain the minimum value of an optimal solution at the time of production and on going demand. This paper is a review of the work done by C.K. Sahoo and S.K. Sahoo International Conference on Industrial Engineering and Operations Management, 2010
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    MODEL PERSEDIAAN PRODUKSI DENGAN MEMPERHITUNGKAN NILAI DETERIORASI ITEM DAN SHORTAGE
    (2013-03-26) S, Jepris; Nababan, T. P.; L, Endang
    In this paper we develop production inventory model where products were stored in the inventory suffered decay or deteriorate overtime with shortage allowed. The rate of deterioration give an impact on the level of inventory that also has an effect on the amount of unmet demand. Inventory levels and shortage rate are calculated by the exponential distribution involving deterioration. Deterioration cost, the cost of retained products, and the cost of shortages can be formulated so that the total cost of the system be calculated. Then, the optimal inventory levels, the optimal backlog, the optimal cycle time are formulated by calculating the first derivative of the total cost function