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Journal articles on the topic 'Inventory control Stock control'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Hipkin, I. B. "A situational approach to the application of the inventory control theory to maintenance spares control." South African Journal of Business Management 22, no. 4 (December 31, 1991): 101–6. http://dx.doi.org/10.4102/sajbm.v22i4.907.

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The management of maintenance spares has frequently been treated as part of the management of the total inventory in production-oriented organizations. In this article it is suggested that maintenance spares should be grouped into four categories: non-stock, usage stock, project stock and insurance stock. Rather than using a common inventory control approach to all spares, different techniques should be applied to each category. Developments in reliability-centred maintenance will result in less reliance on forecasting maintenance spares requirements, thereby permitting a higher service level without an increase in inventory carrying costs.

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2

Dona Sabila, Alzena, Mustafid Mustafid, and Suryono Suryono. "Inventory Control System by Using Vendor Managed Inventory (VMI)." E3S Web of Conferences 31 (2018): 11015. http://dx.doi.org/10.1051/e3sconf/20183111015.

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The inventory control system has a strategic role for the business in managing inventory operations. Management of conventional inventory creates problems in the stock of goods that often runs into vacancies and excess goods at the retail level. This study aims to build inventory control system that can maintain the stability of goods availability at the retail level. The implementation of Vendor Managed Inventory (VMI) method on inventory control system provides transparency of sales data and inventory of goods at retailer level to supplier. Inventory control is performed by calculating safety stock and reorder point of goods based on sales data received by the system. Rule-based reasoning is provided on the system to facilitate the monitoring of inventory status information, thereby helping the process of inventory updates appropriately. Utilization of SMS technology is also considered as a medium of collecting sales data in real-time due to the ease of use. The results of this study indicate that inventory control using VMI ensures the availability of goods ± 70% and can reduce the accumulation of goods ± 30% at the retail level.

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3

Hill, Roger M. "Inventory control with indivisible units of stock transfer." European Journal of Operational Research 175, no. 1 (November 2006): 593–601. http://dx.doi.org/10.1016/j.ejor.2005.04.043.

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4

RathinaKumar, V., K. Lalitha Priya, Prasanna Kumar.I, and C. Ravekumar. "Construction Material Management through Inventory Control Techniques." International Journal of Engineering & Technology 7, no. 3.12 (July 20, 2018): 899. http://dx.doi.org/10.14419/ijet.v7i3.12.16558.

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Objectives: A research has shown that the construction materials account for more than 55%-60% of the total expenditure of a project. Efficient material planning plays a major role in the successful handing over of a project within the estimated cost and schedule. Methods: This paper mainly focuses on materials planning and inventory control as these are the major aspects of material management. S-curve analysis is performed to measure the fluctuation between estimated materials cost and market materials cost. The major reasons for this are identified by interviewing engineers and contractors. Inventory control techniques such as ABC classification as well as EOQ analysis are conducted. Findings: The result of the S-curve analysis show that the actual materials cost is higher than the planned materials cost in most cases. ABC and EOQ analysis are applied to maintain sufficient stock in inventory and any given point of time, to protect the materials in the inventory against damages, to reduce inventory holding costs, to overcome stock-out problems and to maintain the inventory in an optimal level. Sensitivity check is applied to the results of EOQ analysis. The stock-out of A class and B class material problems faced in the construction site can be reduced by the application of ABC classification and BOQ analysis. The total expenditure of inventory is less after the adoption of these simple inventory control techniques. Conclusion: Instead of using costly software for inventory management, the engineers and contractors may use these simple inventory control techniques which are equally beneficial and economical.

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5

Ernst, Ricardo, Jose-Luis Guerrero, and Alan Roshwalb. "A Quality Control Approach for Monitoring Inventory Stock Levels." Journal of the Operational Research Society 44, no. 11 (November 1993): 1115. http://dx.doi.org/10.2307/2583873.

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6

Ernst, Ricardo, Jose-Luis Guerrero, and Alan Roshwalb. "A Quality Control Approach for Monitoring Inventory Stock Levels." Journal of the Operational Research Society 44, no. 11 (November 1993): 1115–27. http://dx.doi.org/10.1057/jors.1993.184.

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7

Ignaciuk, Przemysław, and Łukasz Wieczorek. "Networked Base-Stock Inventory Control in Complex Distribution Systems." Mathematical Problems in Engineering 2019 (November 4, 2019): 1–14. http://dx.doi.org/10.1155/2019/3754367.

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This paper addresses the resource distribution problem in logistic networks with a complex, multi-echelon interconnection structure. The considered class of systems encompasses two types of nodes: controlled nodes subject to inventory management decisions and sources providing goods to the system to sustain the sales. The stock gathered at the controlled nodes is used to satisfy an exogenous, uncertain demand that may be placed at any controlled node. The stock is replenished from the sources and other controlled nodes, and the flow of goods proceeds with positive lead-time delay. The network topology does not assume any structural simplifications typically considered in inventory control problems, i.e., the nodes can form a link with any other node which leads to a mesh, multi-echelon structure. The contribution of this paper is twofold: First, the classical order-up-to policy is analyzed formally with respect to such nontrivial connectivity architectures, and conditions for full demand satisfaction under any bounded demand pattern are established. Next, a networked extension of the classical policy is proposed. The introduced networked policy is shown to generate smaller holding costs while maintaining the same service level as the classical policy. The formal study is supported by numerical tests involving genetic algorithms and simulation-based optimization.

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8

Braglia, Marcello, Roberto Gabbrielli, and Francesco Zammori. "Stock diffusion theory: a dynamic model for inventory control." International Journal of Production Research 51, no. 10 (May 2013): 3018–36. http://dx.doi.org/10.1080/00207543.2012.752584.

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9

Saputro, Janu Ilham, Irfan Yuanda Hasibuan, and Dwiana Octavia. "Information System Design Reminder Inventory Control At PT Nuansa Timur Lestari." Aptisi Transactions on Management (ATM) 4, no. 1 (December 29, 2019): 49–56. http://dx.doi.org/10.33050/atm.v4i1.1085.

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The current information needs in the business world to be very important in determining the progress of a company. A good activity on a single company or technology is also determined by the available information. PT Lestari Eastern Nuances is a company engaged in the restaurant. The logging system supplies the raw materials of food are running currently still using Microsoft Excel to record incoming and outgoingraw food. The current running system still has many flaws and weaknesses as it takes quite a long time to figure out the amount of supplies of goods raw materials because an admin shed have to calculate the physical stock quantities directly, the occurrence of the difference in the number of requests the raw material with raw material expenses due to miscalculations by admin warehouse, takes a long time to make a request and expense report raw materials causing the company's performance be hampered, the absence of a reminder to remind Admins about the number of warehouse stock of raw materials so that when the raw materials needed by the chef stock no. Based on existing problems then needed a system to help the admin staff stock in managing demand and pengerluaran raw material so that it doesn't happen the difference in stocks of raw materials. The system will be created using the PHP programming language and the Mysql database, the method of analysis PIECES and using a systems development method in System Development Life Cycle (SDLC).

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10

Han, Qing Tian. "Study on Application of Inventory Control Models." Applied Mechanics and Materials 336-338 (July 2013): 624–27. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.624.

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Firstly, the inventory control models were studied, considering of the cost of store and lack of stock. Secondly, both the models of the distribution centre and supplier were presented. Finally, a numeric example was analyzed by applying the models. The results show that the models are easily to be carried out in engineering field, and it is useful to control the inventory and raise the store efficiency.

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11

Karsten, Julian Seph, and A. A. Istri Ngurah Eka Karyawati. "Pengembangan Sistem Inventory Control Pada Perusahaan PT Alam Indah Utama." JELIKU (Jurnal Elektronik Ilmu Komputer Udayana) 8, no. 1 (August 9, 2019): 1. http://dx.doi.org/10.24843/jlk.2019.v08.i01.p01.

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Alam Indah Utama are official pertamina lubricant dealer in bali. Alam Indah Utama moves in lubricant distribution on pertamina oil. Alam Indah utama as a official dealer had an advantages to buy the oil direct from Pertamina. Alam Indah Utama used system that pertamina gave and the second system are internal system. And in this journal will talk about improving the Alam Indah Utama’s internal inventory stock system. With hope can make the internal system that can show the stocks, customer, supplier and past transaction.

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12

Wei, Guo, Shi Wei Zhao, and Wen Fang Qu. "Research of Stochastic Control on Aviation Supplies Inventory." Advanced Materials Research 472-475 (February 2012): 3339–42. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.3339.

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In this paper, the aviation supplies inventory in maintenance process is taken as the study subject. Based on reasonable hypothesis, aviation supplies consuming process in a fixed period is regarded as stochastic process, and inventory process and inventory control system model are built. Take tire inventory as an example and then the model parameters have been identified. On this basis, aviation supplies inventory control system is designed by means of stochastic control theory, which could optimize inventory quantity. Finally, simulate inventory control process by MATLAB simulation software. The results show that inventory variance and average inventory quantity decrease, which can significantly reduce the stock fund and maintenance cost.

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13

Wu, You Bo, Yi Tao, Xiao Hong Pan, and Peng Cheng Wu. "RFID-Based Optimization Method for Inventory Control Strategy." Applied Mechanics and Materials 34-35 (October 2010): 1149–53. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1149.

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As the market competition became more fiercely and the customers’ needs of diversified products increased, small and medium enterprises (SME) were more and more aware of the importance of getting quick respond of the market. More and more enterprises felt the logistics cost pressure during this business. How to lower down the logistics cost especially the stock cost became crucial for these SME enterprises. Further more, for enterprises whose producing type is many varieties small batches, how to use valid method to decline inventory and waste, is a great hard nut to crack. This article targeted on inventory control of clothing manufacturing enterprises for research, RFID technology was applied in stock management, optimization method was adopted for inventory control based on RFID, optimization control model was built, and the route for declined inventory cost and waste was analyzed. Finally, the application method was verified according emulation.

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Wu, You Bo, Yi Tao, Xiao Hong Pan, and Peng Cheng Wu. "RFID-Based Optimization Method for Inventory Control Strategy." Applied Mechanics and Materials 34-35 (October 2010): 1983–87. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1983.

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As the market competition became more fiercely and the customers’ needs of diversified products increased, small and medium enterprises (SME) were more and more aware of the importance of getting quick respond of the market. More and more enterprises felt the logistics cost pressure during this business. How to lower down the logistics cost especially the stock cost became crucial for these SME enterprises. Further more, for enterprises whose producing type is many varieties small batches, how to use valid method to decline inventory and waste, is a great hard nut to crack. This article targeted on inventory control of clothing manufacturing enterprises for research, RFID technology was applied in stock management, optimization method was adopted for inventory control based on RFID, optimization control model was built, and the route for declined inventory cost and waste was analyzed. Finally, the application method was verified according emulation.

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15

Huizen, Lenny Margaretta, and Mustafid. "Inventory Control System for Vaccines Distribution With Model Predictive Control In Hospital." E3S Web of Conferences 73 (2018): 13020. http://dx.doi.org/10.1051/e3sconf/20187313020.

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Inventory control of vaccine amounts is intended to allow the vaccine supply in the pharmacy to be balanced between the stored vaccine and the vaccine released so that the investment is minimized. The research aims to apply inventory control system to minimize inventory quantities while ensuring vaccine availability. Model Predictive Control is used to find minimal cost based cost function through vaccine supply level, vaccine order, and vaccine cost. The results obtained for 4 months by comparing the calculation of hospital methods with Model Predictive Control is the number of orders can be minimized in accordance with the average demand with the amount of existing stock so as to minimize the costs incurred for the purchase of vaccines. The Model Predictive Control can be used to calculate the number of orders to be ordered with an uncertain vaccine request.

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16

Ismail, Siti Zubaidah, and Fatkhurrahman Manani. "Enhancing Palm Oil Inventory Control Support Analytic Tools." Journal of Modern Manufacturing Systems and Technology 5, no. 1 (March 19, 2021): 46–50. http://dx.doi.org/10.15282/jmmst.v5i1.6105.

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Product-Service System (PSS) inventory control in Malaysian palm oil industry is a blend of product or services that offer a good worth in regards to economics and also environment. This paper intends to establish a support analytic device for implementation in the palm oil industry. Many smallholder businesses do not have any kind of supply systematic record-keeping to keep the supply in a respectable operating. The existing technique of figuring out supply takes a yearly physical inventory by comparing the real inventory with document levels. This method is a pricey as well as lengthy effort. In this paper, an inventory control web-based application device was developed to meet customer demand and methodical record management is significant to have respectable tracking and also analysis as part of being effective. This tool will certainly help the firm to save the main stock data-based on collected information and also to monitor the motion of the stocks to ensure that whatever is controlled as well as in great order. This tracking process makes it much easier for firms to decide and also for forecasting for products and services in palm oil plantation.

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17

Tseng and Yu. "Data-Driven Iron and Steel Inventory Control Policies." Mathematics 7, no. 8 (August 7, 2019): 718. http://dx.doi.org/10.3390/math7080718.

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In this study, we investigated the optimal material inventory policy with regard to the iron and steel industry’s effort to reduce massive overstocking issues in the face of increased corporate competitiveness. We gathered actual data, including sales and inventory numbers, from a steel and iron company over a period of 216 weeks between January 2010 and February 2014. We then utilized the Markov decision process (MDP) to analyze this data for inventory problems, such as relevant reorder points and reorder quantity issues as they relate to lead time, stock on hand and the limitations of having stock in-transit. The purpose of the study was to determine the most effective method for minimizing costs by using the optimal inventory policy to calculate and verify the effectiveness of the results. The final 52 weeks of data were put aside, while the initial 164 weeks were used to create an inbound material receipt system to ultimately establish a yearly (52-week) policy based on the inventory and sales data for weeks 113–164. Finally, we verified the effectiveness of the policy using the data from the final 52 weeks. The results showed that our proposed categorization method was effective for reducing the quantity of inventory while still meeting quarterly demands.

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18

Fatma, Erika, and Dian Serena Pulungan. "Analisis Pengendalian Persediaan Menggunakan Metode Probabilistik dengan Kebijakan Backorder dan Lost sales." Jurnal Teknik Industri 19, no. 1 (February 27, 2018): 38. http://dx.doi.org/10.22219/jtiumm.vol19.no1.38-48.

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High fluctuating demand at companies encourages to perform inventory control. This study aims to determine the exact inventory control method for the company, which minimizes the inventory cost and inventory amount provided by the company. This research analyzes various aspects related to the system and inventory cost used by the company. This research uses probabilistic inventory methods, which are probabilistic controls, P models, and Q models. Based on data processing, P model provides an optimal solution. P system provides cost and amount of optimal safety stock compared to other inventory models.

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Fatma, Erika, and Dian Serena Pulungan. "Analisis Pengendalian Persediaan Menggunakan Metode Probabilistik dengan Kebijakan Backorder dan Lost sales." Jurnal Teknik Industri 19, no. 1 (February 27, 2018): 38. http://dx.doi.org/10.22219/jtiumm.vol19.no1.40-51.

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High fluctuating demand at companies encourages to perform inventory control. This study aims to determine the exact inventory control method for the company, which minimizes the inventory cost and inventory amount provided by the company. This research analyzes various aspects related to the system and inventory cost used by the company. This research uses probabilistic inventory methods, which are probabilistic controls, P models, and Q models. Based on data processing, P model provides an optimal solution. P system provides cost and amount of optimal safety stock compared to other inventory models.

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20

Feng, Keli, and Uday S. Rao. "Echelon-stock () control in two-stage serial stochastic inventory systems." Operations Research Letters 35, no. 1 (January 2007): 95–104. http://dx.doi.org/10.1016/j.orl.2005.11.007.

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21

Selçuk, B. "An adaptive base stock policy for repairable item inventory control." International Journal of Production Economics 143, no. 2 (June 2013): 304–15. http://dx.doi.org/10.1016/j.ijpe.2012.01.011.

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22

Axsäter, Sven, and Kaj Rosling. "Notes: Installation vs. Echelon Stock Policies for Multilevel Inventory Control." Management Science 39, no. 10 (October 1993): 1274–80. http://dx.doi.org/10.1287/mnsc.39.10.1274.

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23

., Mustafid, Alzena Dona Sabila, and Suryono . "Sistem Pengendali Inventori Supply Chain Dengan Pendekatan Probabilitas Pada Industri Pakaian." JURNAL SISTEM INFORMASI BISNIS 8, no. 1 (April 30, 2018): 17. http://dx.doi.org/10.21456/vol8iss1pp17-24.

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Inventory control systems have an important role in supply chain management to control process of production, inventory and distribution of products in accordance with rapidly changing consumer demand. The research aims to develop inventory control system on supply chain that can manage the number of production and supply of products based on variables of consumer demand and lead time. Supply chain inventory control systems are designed using model of supply chain inventory control within the information system framework. Model of inventory control using variable of demand lead time is designed by probability approach. Input to the system are data of demand and lead time sent by retail. The results of research provide theory of supply chain inventory control system with probability approach, especially on developing the theory of probability distribution for combined variables from two random variables of normal distributed. Inventory control system used to determine safety stock and reorder point as the basis for determining the replenishment stock. Furthermore by the system, supply chain management can manage the estimation of production number, and manage inventory and stock number of products in warehouse, supplier and retail in accordance with the consumer demand.

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Ardhyanti Mita Nugraha, Joanna, Suryono Suryono, and dan Jatmiko Endro Suseno. "Rule Based System for Medicine Inventory Control Using Radio Frequency Identification (RFID)." E3S Web of Conferences 31 (2018): 11016. http://dx.doi.org/10.1051/e3sconf/20183111016.

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Rule based system is very efficient to ensure stock of drug to remain available by utilizing Radio Frequency Identification (RFID) as input means automatically. This method can ensure the stock of drugs to remain available by analyzing the needs of drug users. The research data was the amount of drug usage in hospital for 1 year. The data was processed by using ABC classification to determine the drug with fast, medium and slow movement. In each classification result, rule based algorithm was given for determination of safety stock and Reorder Point (ROP). This research yielded safety stock and ROP values that vary depending on the class of each drug. Validation is done by comparing the calculation of safety stock and reorder point both manually and by system, then, it was found that the mean deviation value at safety stock was 0,03 and and ROP was 0,08.

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Jawahir, Jawahir, Muhamad Ifran Sanni, and Ahmad Kurniawan. "Prototype Sistem Inventory Control Berbasis Barcode Pada PT.Anugrah Distributor Indonesia." Journal CERITA 6, no. 2 (August 24, 2020): 154–61. http://dx.doi.org/10.33050/cerita.v6i2.1140.

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The rapid technological growth should be able to support industrial activities, this occurs in checking the inventory of goods at PT.Anugrah Distributor Indonesia, at this time the warehouse admin must check and then input data on so many stock items that are often missed so it takes a long time in checking stock of goods. By scanning items by using a barcode, displaying the history of the incoming and outgoing goods code to the warehouse and being able to manage the results of scanning based on the time and date in real-time. The use of SWOT or Strengths, Weaknesses, Opportunities & Threats methods as well as to obtain information that is appropriate to the problem that researchers must overcome using interviews, observation and literature studies. and to design a system design using UML and then using PHP (Hypertext) and Sublime Text applications. The inventory control system application will be able to facilitate the recording and search of inventory data in real-time as well as controlling the stock of goods in the company

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Sosodoro, Ineu Widaningsih, Anastasia Lidya Maukar, and Intan Puspita Pribadi. "Designing of Inventory Control for Aluminum Industry." JIE Scientific Journal on Research and Application of Industrial System 3, no. 1 (November 12, 2018): 22. http://dx.doi.org/10.33021/jie.v3i1.495.

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<p>Inventory is one of important factors in manufacturing industry to ensure production process run. This research was conducted in an aluminum ingot manufacture company. The company faces a problem to manage the inventory system for their main raw material. The problem deals with the high expenditure due to safety stock that causes high inventory cost. Total inventory cost based on current condition is $270,706 per year. The proposed improvement method that used in this analysis is continuous review system. This method is applied to determine the appropriate Reorder Point (ROP) and to minimize the inventory cost. Based on the proposed improvement, total inventory cost can be reduced by 30%. This proposed system is also equipped with Decision Support System by using what-if analysis method as the tool to make decision for the next several periods by giving several scenarios and considering the aspects that influence to decision.<br />Keywords: Inventory, Reorder point, Continuous Review System, Decision Support System, What If Analysis, Scenario</p>

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Gao, Chunyan, Yao Wang, Liang Xu, and Yi Liao. "Dynamic Pricing and Production Control of an Inventory System with Remanufacturing." Mathematical Problems in Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/789306.

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We consider optimal pricing and manufacturing control of a continuous-review inventory system with remanufacturing. Customer demand and product return follow independent Poisson processes. Customer demand is filled by serviceable product, which can be either manufactured or remanufactured from the returned product. The lead times for both manufacturing and remanufacturing are exponentially distributed. The objective is to maximize the expected total discounted profit over an infinite planning horizon. We characterize the structural properties of the optimal policy through the optimality equation. Specifically, the optimal manufacturing policy is a base-stock policy with the base-stock level nonincreasing in the return inventory level. The optimal pricing policy is also a threshold policy, where the threshold level is nonincreasing in the return inventory level.

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Indarti, Titik Rahayu, Satibi Satibi, and Endang Yuniarti. "Pengendalian Persediaan Obat dengan Minimum-Maximum Stock Level di Instalasi Farmasi RSUP Dr. Sardjito Yogyakarta." JURNAL MANAJEMEN DAN PELAYANAN FARMASI (Journal of Management and Pharmacy Practice) 9, no. 3 (September 30, 2019): 192. http://dx.doi.org/10.22146/jmpf.45295.

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Inappropriate inventory control of medicines in hospital can lead to shortage or over stock, which is a problem faced by Dr. Sardjito Hospital Yogyakarta. The aim of this study was to examine the effect of the Minimum-Maximum Stock Level (MMSL) method on efficiency and effectivity of medicine inventory at Hospital Pharmacy Dr. Sardjito. A quasi experimental nonequivalent without control group design was applied, and purposive sampling was taken from retrospective data in January-June 2018 and the application of methods prospectively i.e. August-December 2018. Thirty-five types of medicines which met the inclusion and exclusion criteria were obtained, i.e. high cost, high volume, clinicaly important, and supply focus. These types of medicines were included in category A of ABC Pareto Analysis. The effect of minimum-maximum stock level method on inventory value, stock out value, and Inventory Turn Over Ratio (ITOR) was analysed using Wilcoxon Signed Rank Test statistic. The effect of minimum-maximum stock level method on stock out incident was analysed using Mc Nemar Test statistic. This study found that minimum-maximum stock level method to impact the positively their efficiency of drug control marked by decreased of inventory value and ITOR ideal value. The effectiveness of drug control marked by decreased incidence of stock out in Hospital Pharmacy Departement Dr. Sardjito.

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David, Engmir, Irwan Budiman, and Jusra Tampubolon. "Decreasing Total Inventory Cost by Controlling Inventory in Motorcycle Dealer." Jurnal Sistem Teknik Industri 22, no. 2 (July 10, 2020): 41–49. http://dx.doi.org/10.32734/jsti.v22i2.3930.

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This research was conducted at one of the motorcycle dealers in Indonesia. Besides selling motorcycles, this dealer also provides services to repair motorcycles and sells genuine motorcycle parts. Inventory management which the company carried out is still not good enough because there are still demand for spare parts from consumers that cannot be fulfilled by the company. The purpose of this study is to draw up a plan to control spare parts by paying attention to the spare parts that need to be considered, estimating the exact number of spare parts demand, knowing the smallest total inventory cost, knowing the amount of safety stock needed, and knowing when to reorder. In preparing the spare parts control, the methods used are ABC analysis, demand forecasting method, and EOQ method. The results of this study are plans to control the inventory of Tire, Rr. such as the forecasting sales of Tire, Rr. as many as 17338, economic order quantity of Tire Rr are 2158 units, the number of safety stocks of Tire, Rr. needed in 2020 are 1738 units, and the reorder point in 2020 is 8 times with the total inventory cost for Tire, Rr. in 2020 is Rp. 30,009,005.

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Ruiz Estrada, Mario Arturo, and Evangelos Koutronas. "The multi-dimensional ports stock inventory and logistic control graphical modelling." Procedia Computer Science 149 (2019): 80–85. http://dx.doi.org/10.1016/j.procs.2019.01.110.

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31

Meyer, Brad C., and Debra S. Bishop. "Stock Control: Learning Inventory Concepts by Beating Levels and Winning Prizes." Decision Sciences Journal of Innovative Education 14, no. 3 (July 2016): 315–36. http://dx.doi.org/10.1111/dsji.12102.

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32

Chukwudi Iwu, Hycinth, Chukwudi J. Ogbonna, Opara Jude, and Kalu Georgina Onuma. "Application of Inventory Model in Determining Stock Control in an Organization." American Journal of Applied Mathematics and Statistics 2, no. 5 (September 19, 2014): 307–17. http://dx.doi.org/10.12691/ajams-2-5-3.

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33

Wang, Yuzhen, and Li Xu. "Dynamics and Control on a Discrete Multi-Inventory System." Journal of Control Science and Engineering 2019 (May 12, 2019): 1–7. http://dx.doi.org/10.1155/2019/6926342.

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In this paper, a discrete two item inventory model for deteriorating items with a linear stock dependent demand rate without regular supply is given first; then, regular supply is taken into account, which may be regarded as feedback control. An objective function is formed to calculate the net profit with respect to possible profits and possible loss. A necessary criterion for the steady state optimal control problem for optimizing the objective function subjected to the constraints given by the difference equations of the inventory is obtained. At last, an improved model is put forward.

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Xu, Li Wei, Fu Cai Wan, and Yu E. Fan. "Research on the Double Source Stock Control for a Manufacturer Based on EPR." Advanced Materials Research 962-965 (June 2014): 3071–75. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.3071.

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With the widely acception of extended producer responsibility system, reverse logistics has attracted more and more attention. For manufacturers, reverse logistics activities is not inseparable to the general forward logistics, and they constitute the closed-loop supply chain. Decision makers of enterprises need to control the new products inventory and the recovered materials inventory to make the enterprises get the maximum profit.In this paper,the inventory characteristics under the closed-loop supply chain be analyzed and a inventory model for a single repair period, many production period is proposed .On condition that the number of recovery is controlled by the recycling price and is equal in different cycles,the recovered products can be sold as new.A economic production quantity and recycling price can be solved to make the total cost of a single cycle lowest ,which provides a basis for business decisions.

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ZHANG, B. L., and C. YANG. "DELAYED STATE FEEDBACK CONTROL FOR PERIODIC-REVIEW INVENTORY SYSTEMS." ANZIAM Journal 58, no. 3-4 (April 2017): 397–405. http://dx.doi.org/10.1017/s1446181117000153.

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We investigate delayed state feedback control of a periodic-review inventory management system with perishable goods. The stock under consideration is replenished from multiple supply sources. By using delayed states as well as current states of the inventory system, a delayed feedback $H_{\infty }$ control strategy is developed to mitigate bullwhip effects of the system. Some conditions on the existence of the delayed feedback $H_{\infty }$ controller are derived. It is found through simulation results that the proposed delayed $H_{\infty }$ control scheme is capable of improving the performance of the inventory management significantly. In addition, the delayed controller is better than the traditional delay-free $H_{\infty }$ controller.

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Ma, Lijun, Weili Xue, Yingxue Zhao, and Xudong Lin. "Loss-Averse Inventory and Borrowing Decisions with Constraints on Working Capital in Fashion and Textiles Industry." Mathematical Problems in Engineering 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/657641.

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Traditional inventory models focus on operational decisions and inventory control. Quite few models consider the financial constraint and decision bias such as loss aversion, which are the reality in today's business environment, especially for the fashion and textiles industry. In this paper we study the inventory control problem for a loss-averse retailer with financial constraint for operations in a periodic review setting in a finite horizon. We characterize the optimal inventory control policies with self-financing or with borrowing as capital-dependent base-stock policies. We demonstrate with numerical examples that the optimal base-stock level is nonincreasing in the accumulated wealth and the loss-aversion indicator.

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Perry, David. "A Double Band Control Policy of a Brownian Perishable Inventory System." Probability in the Engineering and Informational Sciences 11, no. 3 (July 1997): 361–73. http://dx.doi.org/10.1017/s0269964800004885.

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The blood bank system is a typical example of a perishable inventory system. The commodity arrival and customer demand processes are stochastic. However, the stored items have a constant lifetime. In this study, we introduce a diffusion approximation to this system. The stock level is represented by the amount of items arriving during the age of the oldest item; it is assumed to fluctuate as an alternating two-sided regulated Brownian motion between barriers 0 and 1. Hittings of level 0 are outdatings and hittings of level 1 are unsatisfied demands. Also, there are two predetermined switchover levels, a and b, with 0 ≤ a < b ≤ 1. Whenever the stock level process upcrosses level b, the controller generates a switch in the drift from γ = γ0 to γ = γ1, while downcrossings of level a generate switches from γ1 to γ0. A useful martingale is introduced for analyzing the stationary law of the controlled process as well as the total expected discounted cost.

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Hanukov, Gabi, Tal Avinadav, Tatyana Chernonog, and Uri Yechiali. "A multi-server queueing-inventory system with stock-dependent demand." IFAC-PapersOnLine 52, no. 13 (2019): 671–76. http://dx.doi.org/10.1016/j.ifacol.2019.11.124.

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Riskian Tahmid, Fajrul Islami, Mutiana Pratiwi, and Ulya Ilhami Arsyah. "Perancangan Sistem Informasi Data Stock Controlling dengan Metode EOQ." Jurnal Teknologi 9, no. 1 (June 26, 2019): 1–8. http://dx.doi.org/10.35134/jitekin.v9i1.2.

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Information thecnology development is quickly even in outlying places that are never feeld its benefit before, but nowdays they can deeply enjoy able with information thecnology serves in an online manner. The business are established and progressed usually organized their supply management there (in the business). Previously PT. MUTIA MULIA PADANG has difficulty in the supply of the management be cause of manual character.Controlling inventory or inventory management right is not easy. But if too little inventory results in the risk of inventory shortage, as they often can not be imported goods inventory stating sudden cessation of the production process, delays in profits, even loss of customers.It would require an inventory application to manage inventory control, then the company's needs will bemet with swift and precise, so as to control inventory. With the report in the form of file storage can allow minimize the potentially fatal errors, such as losing records. This application is built using the programming language PHP and MySQL, which assisted with modeling UML (Unified Modeling Language)

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Yıldız, M. Said, and M. Mahmud Khan. "Hospital Level Inventory Control and System-Wide Cost Savings: A Case Study from Turkey." Journal of Health Management 20, no. 4 (October 29, 2018): 498–507. http://dx.doi.org/10.1177/0972063418799183.

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Health Transformation Program (HTP) of Turkey, initiated in 2003, improved access to care and quality of health care services. In 2009, HTP implemented a centralized web-based information system to manage inventories of public hospitals. Prior to the introduction of inventory management, significant medical resources were wasted because of misuse, non-use and expiration of medical supplies. The objective of inventory management was to improve the efficiency of hospitals by projecting quantities of items likely to be needed by hospitals over a three-month period. The system also allowed transfer of unneeded and surplus items from one hospital to another. This article estimated cost savings for the health care system through the inter-hospital transfer of items. The success of inventory management was evaluated by using indicators such as the value of medical commodities purchased per unit of service delivered, value of stock to purchase ratios and the value of inter-hospital transfers. Trends in purchase, storage and transfer indicate that the new web-based inventory management infrastructure helped the hospital sector to become more efficient in terms of size of stocks held and inter-temporal changes in the value of stocks. It reduced system-wide waste of medical goods and pharmaceuticals, improved effective use of commodities and reduced storage cost.

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Chou, Chien Chang, J. M. Yih, J. F. Ding, T. C. Han, Y. H. Lin, L. J. Liu, and W. K. Hsu. "Application of a Fuzzy EOQ Model to the Stock Management in the Manufacture System." Key Engineering Materials 499 (January 2012): 361–65. http://dx.doi.org/10.4028/www.scientific.net/kem.499.361.

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In a manufacture system, the inventory control is one of important issues. This paper proposes a fuzzy economic order quantity (EOQ) inventory model for solving the inventory control problem in the manufacture system. Firstly, this paper discusses the square roots of a trapezoidal fuzzy number. Secondly, the square root of fuzzy number is applied to the EOQ inventory model in the manufacture system.

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Tekin, Eylem, Ülkü Gürler, and Emre Berk. "Age-based vs. stock level control policies for a perishable inventory system." European Journal of Operational Research 134, no. 2 (October 2001): 309–29. http://dx.doi.org/10.1016/s0377-2217(00)00250-2.

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Arda, Yasemin, and Jean-Claude Hennet. "Inventory control in a decentralised two-stage make-to-stock queueing system." International Journal of Systems Science 39, no. 7 (May 19, 2008): 741–50. http://dx.doi.org/10.1080/00207720802090971.

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Pang, Zhan. "Optimal dynamic pricing and inventory control with stock deterioration and partial backordering." Operations Research Letters 39, no. 5 (September 2011): 375–79. http://dx.doi.org/10.1016/j.orl.2011.06.009.

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Zolfagharinia, Hossein, Maryam Hafezi, Reza Zanjirani Farahani, and Behnam Fahimnia. "A hybrid two-stock inventory control model for a reverse supply chain." Transportation Research Part E: Logistics and Transportation Review 67 (July 2014): 141–61. http://dx.doi.org/10.1016/j.tre.2014.04.010.

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Arda, Yasemin, and Jean-Claude Hennet. "INVENTORY CONTROL IN A DECENTRALIZED TWO-STAGE MAKE-TO-STOCK QUEUING SYSTEM." IFAC Proceedings Volumes 39, no. 3 (2006): 283–88. http://dx.doi.org/10.3182/20060517-3-fr-2903.00156.

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47

Tsoularis, A. "Deterministic and stochastic optimal inventory control with logistic stock-dependent demand rate." International Journal of Mathematics in Operational Research 6, no. 1 (2014): 41. http://dx.doi.org/10.1504/ijmor.2014.057851.

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Sabbaghnia, Ali, Jafar Razmi, Reza Babazadeh, and Behzad Moshiri. "Reducing the Bullwhip effect in a supply chain network by application of optimal control theory." RAIRO - Operations Research 52, no. 4-5 (October 2018): 1377–96. http://dx.doi.org/10.1051/ro/2018025.

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Controlling the bullwhip effect and reducing the propagated inventory levels throughout the supply chain layers has an important role in reducing the total inventory costs of a supply chain. In this study, an optimal controller that considers demand as control variable is designed to dampen propagated inventory fluctuations for each node throughout the supply chain network. The model proves to be very useful in revealing the dynamic characteristics of the chain and provides a proper interface to study decisions taken into account at each node of the supply chain in different periods by decision makers (DMs). In the proposed approach, two feedback loops and online updated values of net stock quantities are used for calculation of the orders. To investigate the efficiency of the proposed approach, a real case of bicycle industry is conducted. The acquired results justify the efficiency of the proposed approach in controlling and dampening the bullwhip effect and reducing inventory levels, net stock quantities and inventory attributed costs throughout the supply chain network layers.

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Rodrigues Pereira, João Bosco, David Barbosa de Alencar, Alexandra Priscilla Tregue Costa, and Antônio Estanislau Sanches. "Methodology for Indirect Material Control in a White Line Company." International Journal for Innovation Education and Research 7, no. 11 (November 30, 2019): 799–807. http://dx.doi.org/10.31686/ijier.vol7.iss11.1934.

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At the fierce level that companies generally find themselves in, it is no longer allowed to let the missing material off the shelf of a stock, be it material that is part of the product or indirect material that assists in assembly activity. People involved in the item buying activity need to have full control of inventory, whether planning, changing the planned or planning the unexpected. For the preparation of this study, the daily activity of indirect stock operators of a White Line Company was observed. The factory material control system (ERP) has many functions that made control complex. In parallel to the ERP system, a material control worksheet was created and shared in the cloud that allows all necessary information regarding an item to be easily viewed, where the indirect material worksheet manager needs to update daily by downloading every morning information from the ERP system. Getting better inventory supply chain management, better execution of activities.

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Mertins, K., and U. Lewandrowski. "Inventory safety stocks of kanban control systems." Production Planning & Control 10, no. 6 (January 1999): 520–29. http://dx.doi.org/10.1080/095372899232812.

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