A vendor-buyer supply chain model with stochastic lead times and screening errors

With the purpose of researching the bullwhip effect when there is a callback center in the supply chain system, this paper establishes a new supply chain model with callback structure, which has a material supplier, a manufacture, and two retailers. The manufacture and retailers all employ AR(1) demand processes and use order-up-to inventory policy when they make order decisions. Moving average forecasting method is used to measure the bullwhip effect of each retailer and manufacture. We investigate the impact of lead-times of retailers and manufacture, forecasting precision, callback index, and marketing share on the bullwhip effect of both retailers and manufacture. Then we use the method of numerical simulation to indicate the different parameters in this supply chain. Furthermore, this paper puts forward some suggestions to help the enterprises to control the bullwhip effect in the supply chain with callback structure.

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The Impact of Lead Time Uncertainty on Supply Chain Performance Considering Carbon Cost

Sustainability ◽

10.3390/su11226457 ◽

2019 ◽

Vol 11 (22) ◽

pp. 6457

Author(s):

Li ◽

Fei ◽

Zhou ◽

Gajpal ◽

Chen

Keyword(s):

Supply Chain ◽

Lead Time ◽

Lead Times ◽

Supply Chain Performance ◽

Chain Model ◽

Carbon Cost ◽

Inventory Costs ◽

Time Uncertainty ◽

Supply Chain Model ◽

Lead Time Uncertainty

In supply chain operation practices, lead time uncertainty is a common management issue. Uncertain lead time can lead to increased inventory costs and unstable service levels, which will directly affect the overall operation performance of the supply chain. While considering environmental performance in supply chain, it is important to understand how an uncertain lead time will affect sustainable performance. In this paper, we constructed a supply chain model with stochastic lead time and explored the relationship between uncertain lead time and supply chain performance. We considered carbon cost, inventory cost, and service level as a supply chain performance. System dynamics methodology was employed to observe and explore the dynamic change trend of the overall performance in the complicated supply chain model. This was done under both different levels of lead time standard deviation and different order policies. The results demonstrate how stochastic lead times can significantly increase inventory costs and carbon costs. Therefore, we propose appropriate ordering policies which mitigate the negative impacts of stochastic lead times.

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Optimised immunisation supply chain model saves costs in the DRC

PharmacoEconomics & Outcomes News ◽

10.1007/s40274-021-7855-0 ◽

2021 ◽

Vol 882 (1) ◽

pp. 21-21

Keyword(s):

Supply Chain ◽

Chain Model ◽

Supply Chain Model

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Multi-echelon Supply Chain Model for Deteriorating Products in a Fuzzy Deterioration Environment

Fuzzy Information and Engineering ◽

10.1080/16168658.2021.1886814 ◽

2019 ◽

Vol 11 (1) ◽

pp. 86-104

Author(s):

S. Priyan ◽

P. Mala

Keyword(s):

Supply Chain ◽

Chain Model ◽

Supply Chain Model

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Two-echelon imperfect production fuzzy supply chain model for reliability dependent demand with probabilistic deterioration and rework

Journal of Intelligent & Fuzzy Systems ◽

10.3233/jifs-200562 ◽

2021 ◽

pp. 1-15

Author(s):

Sudip Adak ◽

G.S. Mahapatra

Keyword(s):

Supply Chain ◽

Production Rate ◽

Production Cost ◽

Idle Time ◽

Chain Model ◽

Specific Time ◽

Defective Items ◽

Imperfect Production ◽

Supply Chain Model ◽

Dependent Demand

This paper develops a fuzzy two-layer supply chain for manufacturer and retailer with defective and non-defective types of products. The manufacturer produces up to a specific time, including faulty and non-defective items, and after the screening, the non-defective item sends to the retailer. The retailer’s strategy is to do the screening of items received from the manufacturer; subsequently, the perfect quality items are used to fulfill the customer’s demand, and the defective items are reworked. The retailer considers that customer demand is time and reliability dependent. The supply chain considers probabilistic deterioration for the manufacturer and retailers along with the strategies such as production rate, unit production cost, cost of idle time of manufacturer, screening, rework, etc. The optimum average profit of the integrated model is evaluated for both the cases crisp and fuzzy environments. Managerial insights and the effect of changes in the parameters’ values on the optimal inventory policy under fuzziness are presented.

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The problems facing agricultural sector in Zanzibar and the prospects of Waqf-Muzar’ah-supply chain model

Humanomics ◽

10.1108/h-02-2017-0033 ◽

2017 ◽

Vol 33 (2) ◽

pp. 189-210 ◽

Cited By ~ 2

Author(s):

Issa Salim Moh’d ◽

Mustafa Omar Mohammed ◽

Buerhan Saiti

Keyword(s):

Supply Chain ◽

Interest Rates ◽

Financial Models ◽

Agricultural Sector ◽

Chain Model ◽

Content Type ◽

High Interest ◽

Supply Chain Model ◽

The Government ◽

Clove Industry

Purpose This paper aims to identify the appropriate model to address the financial challenges in agricultural sector in Zanzibar. Since the middle of 1960, clove production has continually and significantly decreased because of some problems and challenges that include financial ones. The financial intermediaries such as banks, cooperatives and micro-enterprises provide micro-financing to the farmers with high interest rates along with collateral requirements. The numerous programmes, measures and policies adopted by the relevant parties to find out the solutions to the dwindling clove production have failed. Design/methodology/approach The authors will review and examine several existing financial models, identify the issues and challenges of the current financial models and propose an appropriate Islamic financing model. Findings The numerous programmes, measures and policies adopted by the relevant parties to find out the solutions to the dwindling clove production have failed. This study, therefore, proposed a Waqf-Muzara’ah-supply chain model to address the financial challenge. Partnership arrangement is also suggested in the model to mitigate the issues of high interest rates and collateral that constrains the financial ability of the farmers and their agricultural output. Originality/value The contribution of the agricultural sector to the economic development of Zanzibar Islands is considerable. As one of the important agricultural sectors, the clove industry was the economic backbone of the government of Zanzibar. This study is believed to be a pioneering work; hence, it is the first study that investigates empirically the challenges facing the clove industry in Zanzibar.

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A Study on Leagile Supply Chain Model and Performance Evaluation System Based on Lean Agile Theory

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.635-637.1771 ◽

2014 ◽

Vol 635-637 ◽

pp. 1771-1775 ◽

Cited By ~ 3

Author(s):

Hui Min Jia ◽

Kai Chao Yu ◽

Jin Chang Zhang

Keyword(s):

Supply Chain ◽

Performance Evaluation ◽

Evaluation System ◽

Operating Mode ◽

Agile Manufacturing ◽

Chain Model ◽

Performance Evaluation System ◽

Supply Chain Model ◽

And Performance ◽

Lean Supply Chain

Leagile supply chain integrates lean supply chain and agile supply chain. In this paper, the theory of lean production and agile manufacturing are compared and analyzed, and then the leagile supply chain model and the performance evaluation system based on DEA are established. Based on the above, this paper provides an example of the evaluation system to verify the operability and effectiveness, which can provide the reference for enterprises to improve operating mode of the supply chain or develop a new leagile supply chain.

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