Multi objective inventory model for material resource planning with uncertain lead-time

2021 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Anwar Mahmoodi ◽  
Heibatolah Sadeghi
Keyword(s):  
Lead Time ◽  
Resource Planning ◽  
Inventory Model ◽  
Material Resource ◽  
Multi Objective

scholarly journals Multi-Objective Inventory Model with Lead-Time and Defective Items

2019 ◽  
Vol 9 (2) ◽  
pp. 2415-2420
Keyword(s):  
Lead Time ◽  
Inventory Model ◽  
Inventory Problem ◽  
Defective Items ◽  
Multi Objective ◽  
Deterministic Demand ◽  
Decision Making Problem ◽  
Holding Cost ◽  
Total Inventory

Inventory problem are generally classified under decision making problem where lead time plays an important role in performance and services to customers during supply and placement of order of an item orders can be placed in shorter lead time with higher price or in longer lead time with lower cost. In this paper we have formulated multi-objective inventory model with one objective of minimizing the total inventory cost and other objective of maintaining the quality of the product by discarding the defective items. The model involved the deterministic demand, lead time dependent lead time cost, holding cost, ordering cost and inspection cost for inspecting defective items. The techniques of priority goal programming and genetic algorithm are applied and the results are compared. The sensitivity analysis is explained due to restriction in cost parameter. The model is finally illustrated with a numerical example.

scholarly journals Three-Echelon Inventory Model with Permissible Delay in Payments under Controllable Lead Time and Backorder Consideration

2014 ◽  
Vol 2014 ◽  
pp. 1-16 ◽  
Author(s):  
M. F. Yang ◽  
Wei-Chung Tseng
Keyword(s):  
Supply Chain ◽  
Lead Time ◽  
Critical Issue ◽  
Solution Procedure ◽  
Inventory Model ◽  
Permissible Delay In Payments ◽  
Inventory Policy ◽  
Controllable Lead Time ◽  
Key Factor ◽  
Delay In Payments

This paper proposes a three-echelon inventory model with permissible delay in payments under controllable lead time and backorder consideration to find out the suitable inventory policy to enhance profit of the supply chain. In today’s highly competitive market, the supply chain management has become a critical issue in both practice and academic and supply chain members have to cooperate with each other to bring more benefits. In addition, the inventory policy is a key factor to influence the performance of the supply chain. Therefore, in this paper, we develop a three-echelon inventory model with permissible delay in payments under controllable lead time and backorder consideration. Furthermore, the purpose of this paper is to maximize the joint expect total profit on inventory model and attempt to discuss the inventory policy under different conditions. Finally, with a numerical example provided here to illustrate the solution procedure, we may discover that decision-makers can control lead time and payment time to enhance the performance of the supply chain.

scholarly journals An Inventory Model for Deteriorating Drugs with Stochastic Lead Time

2018 ◽  
Vol 15 (12) ◽  
pp. 2772 ◽  
Author(s):  
Jian Li ◽  
Lu Liu ◽  
Hao Hu ◽  
Qiuhong Zhao ◽  
Libin Guo
Keyword(s):  
Shelf Life ◽  
Inventory Management ◽  
Lead Time ◽  
Service Level ◽  
Inventory Model ◽  
Effective Management ◽  
Product Availability ◽  
Stochastic Lead Time ◽  
Random Lead Time ◽  
The Right

Inventory management of deteriorating drugs has attracted considerable attention recently in hospitals. Drugs are a kind of special product. Two characteristics of some drugs are the shorter shelf life and high service level. This causes hospitals a great deal of difficulty in inventory management of perishable drugs. On one hand, hospitals should increase the drug inventory to achieve a higher service level. On the other hand, hospitals should decrease the drug inventory because of the short shelf life of drugs. An effective management of pharmaceuticals is required to ensure 100% product availability at the right time, at the right cost, in good conditions to the right customers. This requires a trade-off between shelf-life and service level. In addition, many uncontrollable factors can lead to random lead time of drugs. This paper focuses on deteriorating drugs with stochastic lead time. We have established a stochastic lead time inventory model for deteriorating drugs with fixed demand. The lead time obeyed a certain distribution function and shortages were allowed. This model also considered constraints on service level, stock space and drug shelf life. Through the analysis of the model, the shelf life of drugs and service level were weighted in different lead time distributions. Empirical analysis and sensitivity analysis were given to get reach important conclusions and enlightenment.

scholarly journals ANALISA SISTEM PENGENDALIAN BAHAN BAKAR MINYAK HIGH SPEED DIESELDIPLTD KLADEMAK SORONG, PAPUA BARAT

2018 ◽  
Author(s):  
Irman Amri
Keyword(s):  
High Speed ◽  
Resource Planning ◽  
Material Resource ◽  
Papua Barat

Artikel ini telah diterbitkan dalam Prosiding Simposium Nasional Teknologi Terapan (SNTT) 5 tahun 2017 di Mataram , dengan Nomor ISSN 2339-028X. ABSTRAK . PLTD Klademak Sorong merupakan salah satu bagian dari sistem interkoneksi pembangkit energi listrik yang ada di kota Sorong dan sekitarnya. Kekurangan persediaan BBM HSD sangat dihindari, karena akan menimbulkan biaya kegagalan proses yang cukup besar. Namun selama tahun 2011 sampai dengan 2015 kekurangan persediaan bahan baku masih saja terjadi, hal ini menunjukkan bahwa sistem pengendalian persediaan yang dilakukan oleh perusahaan belum optimal. Penelitian ini ingin mengetahui pengendalian persediaan yang optimal menurut metode Material Resource Planning, kemudian hasilnya dibandingkan dengan metode perusahaan dari segi total biaya persediaan yang terjadi. Selain itu penelitian ini juga akan melakukan peramalan permintaan BBM HSD untuk tahun 2017 dan daridata peramalan permintaan tersebut dicari jumlah pembelian yang dapat mengoptimalkan biaya langsung penyimpanan dan biaya kebalikannya yaitu biaya pemesanan BBM HSD.Hasil penelitian menunjukkan persentase penghematan biaya persediaan yang dihasilkan melalui penerapan MRP adalah sebesar 3,2 % pada teknik LFL, dan 31,5 % pada teknik EOQ, serta 51,6 % pada teknik PPB. Ini menunjukkan dari ketiga alternatif metode, MRP PPB memiliki biaya paling rendah dibandingkan metode lainnya. Namun dengan mempertimbangkan kelemahan teknik MRP PPB ini bila diterapkan di PLTD Klademak Sorong adalah resiko dapat berkurang akibat adanya penyusutan, kebocoran, ataupun penurunan kualitas bahan, dimana hal ini dapat terjadi karena masa penyimpanan di tangki akan lebih lama, sehingga alternatif yang dipilih sebagai metode yang digunakan dalam pengemdalian persediaan adalah MRP teknik EOQ.

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