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Sort articles by: Volume | Date | Most Rates | Most Views | Reviews | Alphabet
1.

Optimal pricing and inventory policies for non-instantaneous deteriorating items with permissible delay in payment: Fuzzy expected value model Pages 281-300 Right click to download the paper Download PDF

Authors: Hardik N Soni, Kamlesh A Patel

DOI: 10.5267/j.ijiec.2012.02.005

Keywords: Fuzzy expected value inventory model, Non-instantaneous deterioration, Partial backlogging, Pricing

Abstract:
This study investigates optimal pricing and inventory policies for non-instantaneous deteriorating items with permissible delay in payment. The demand rate is as known, continuous and differentiable function of price while holding cost rate, interest paid rate and interest earned rate are characterized as independent fuzzy variables rather than fuzzy numbers as in previous studies. Under these general assumptions, we first formulated a fuzzy expected value model (EVM) and then some useful theoretical results have been derived to characterize the optimal solutions. An efficient algorithm is designed to determine the optimal pricing and inventory policy for the proposed model. The algorithmic procedure is demonstrated by means of numerical examples.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 2492 | Reviews: 0

 
2.

Permutation based decision making under fuzzy environment using Tabu search Pages 301-312 Right click to download the paper Download PDF

Authors: Mahdi Bashiri, Mehdi Koosha, Hossein Karimi

DOI: 10.5267/j.ijiec.2012.02.001

Keywords: Fuzzy decision making, NP-Hard, Permutation based decision making, Tabu search

Abstract:
One of the techniques, which are used for Multiple Criteria Decision Making (MCDM) is the permutation. In the classical form of permutation, it is assumed that weights and decision matrix components are crisp. However, when group decision making is under consideration and decision makers could not agree on a crisp value for weights and decision matrix components, fuzzy numbers should be used. In this article, the fuzzy permutation technique for MCDM problems has been explained. The main deficiency of permutation is its big computational time, so a Tabu Search (TS) based algorithm has been proposed to reduce the computational time. A numerical example has illustrated the proposed approach clearly. Then, some benchmark instances extracted from literature are solved by proposed TS. The analyses of the results show the proper performance of the proposed method.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 2996 | Reviews: 0

 
3.

Planning Annuaulised hours when spike in demand exists Pages 313-320 Right click to download the paper Download PDF

Authors: MR Sureshkumar, V Madhusudanan Pillai

DOI: 10.5267/j.ijiec.2012.02.004

Keywords: Annualised hours, Manpower planning, Mixed integer linear programming Holiday weeks

Abstract:
Manpower planning using annualised hours is an effective tool where seasonal demand for staff in industry exists. In annualised hours (AH) workers are contracted to work for a certain number of hours per year. The workers are associated with relative efficiency for different types of tasks. This paper proposes a Mixed Integer linear Programming (MILP) model to solve an annualised working hours planning problem when spike in demand exists. The holiday weeks for the workers are considered as partially individualised. If a worker has been assigned with more than one type of working week in a week, this will be compensated with one or more holiday week. The performance of the model is demonstrated with an example. It can be seen that this type of modelling helps to meet the spikes in demand with less capacity shortage compared with one working week in a week.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 1900 | Reviews: 0

 
4.

Just-in-time preemptive single machine problem with costs of earliness/tardiness, interruption and work-in-process Pages 321-336 Right click to download the paper Download PDF

Authors: Mohammad Kazemi, Elnaz Nikoofarid, Amin Aalaei, Reza Kia

DOI: 10.5267/j.ijiec.2011.11.004

Keywords:

Abstract:
This paper considers preemption and idle time are allowed in a single machine scheduling problem with just-in-time (JIT) approach. It incorporates Earliness/Tardiness (E/T) penalties, interruption penalties and holding cost of jobs which are waiting to be processed as work-in-process (WIP). Generally in non-preemptive problems, E/T penalties are a function of the completion time of the jobs. Then, we introduce a non-linear preemptive scheduling model where the earliness penalty depends on the starting time of a job. The model is liberalized by an elaborately–designed procedure to reach the optimum solution. To validate and verify the performance of proposed model, computational results are presented by solving a number of numerical examples.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 2662 | Reviews: 0

 
5.

Performance analysis of supply chains under customer demand information sharing using role play game Pages 337-346 Right click to download the paper Download PDF

Authors: T Chinna Pamulety, V Madhusudanan Pillai

DOI: 10.5267/j.ijiec.2012.02.002

Keywords: Imperfect ADI, (R- S) Policy, Bullwhip Effect, Supply Chain

Abstract:
Supply chain is a network of organizations that work together and performs various business functions such as procurement of raw materials, converting the raw material into semi-finished or finished goods and distributing the same to their ultimate customers. Presence of bullwhip effect in a supply chain is costly and degrades the performance of the supply chain. Reduction in bullwhip effect can improve the efficiency or profitability of a supply chain. The objective of this paper is to know the impact of imperfect Advance Demand Information (ADI) sharing on bullwhip effect in a four-stage serial supply chain and to evaluate the supply chain performance by conducting an experiment similar to the beer distribution game. The performance measures used are variance of orders placed by each stage, fill rate, total inventory at each stage and total holding cost of the supply chain. Results show that imperfect ADI improves the performance of the supply chain. The performance of the supply chain is also evaluated under order up to level (R, S) policy with safety stock and it is found that the performance of supply chain is better when inventory policy used.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 2384 | Reviews: 0

 
6.

Single-machine batch scheduling minimizing weighted flow times and delivery costs with job release times Pages 347-364 Right click to download the paper Download PDF

Authors: Mohammad Mahdavi Mazdeh, Ali Naji Esfahani, Seyyed Ershad Sakkaki, Amir Ebrahimzadeh Pilerood

DOI: 10.5267/j.ijiec.2012.01.004

Keywords: Scheduling, Batch delivery, Branch and bound, Single machine, Weighted flowtimes

Abstract:
This paper addresses scheduling a set of weighted jobs on a single machine in presence of release date for delivery in batches to customers or to other machines for further processing. The problem is a natural extension of minimizing the sum of weighted flow times by considering the possibility of delivering jobs in batches and introducing batch delivery costs. The classical problem is NP-hard and then the extended version of the problem is NP-hard. The objective function is that of minimizing the sum of weighted flow times and delivery costs. The extended problem arises in a real supply chain network by cooperation between two layers of chain. Structural properties of the problem are investigated and used to devise a branch-and-bound solution scheme. Computational experiments show the efficiency of suggested algorithm for solving instances up to 40 jobs.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 2835 | Reviews: 0

 
7.

Weighted Euclidean distance based approach as a multiple attribute decision making method for plant or facility layout design selection Pages 365-382 Right click to download the paper Download PDF

Authors: R. Venkata Rao

DOI: 10.5267/j.ijiec.2012.01.003

Keywords: Multiple attribute decision making, Plant layout design, Weighted Euclidean distance based approach

Abstract:
In response to increasing inflexible customer demands and to improve the competitive advantage, industrial organizations have to adopt strategies to achieve cost reduction, continual quality improvement, increased customer service and on-time delivery performance. Selection of the most suitable plant or facility layout design for an organization is one among the most important strategic issues to fulfill all these above-mentioned objectives. Nowadays, many industrial organizations have come to realize the importance of proper selection of the plant or facility layout design to survive in the global competitive market. Selecting the proper layout design from a given set of candidate alternatives is a difficult task, as many potential qualitative and quantitative criteria need to be considered. This paper proposes a Euclidean distance based approach (WEDBA) as a multiple attribute decision making method to deal with the complex plant or facility layout design problems of the industrial environment. Three examples are included to illustrate the approach.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 4496 | Reviews: 0

 
8.

Supply chain coordination under retail competition and advertising dependent demand Pages 383-392 Right click to download the paper Download PDF

Authors: Mehdi Mirzaee, Ahmad Makui, Ebrahim Manzari Tavakoli

DOI: 10.5267/j.ijiec.2012.01.001

Keywords: Supply chain coordination, Advertising cost sharing contract, Quantity discount contract Retail competition

Abstract:
Supply chain coordination as an effective tool plays an important role in improving supply chain performance. In this article, a two-level supply chain with one manufacturer and two retailers is considered. The order quantity that retailers are faced with depends on the amount of advertisements and both retailers compete with each other on advertising. The Stackelberg game is established between manufacturer and retailers such that the manufacturer and the retailers play the leader and the follower roles, respectively. First, the manufacturer determines the wholesale prices for retailers and instead, the retailers determine the order quantity and advertising level, simultaneously. The manufacturer produces one kind of product and delivers it to retailers before the beginning of selling season. Retailers can affect the order quantity regarding the demand dependency on advertising level through the incurred costs from the advertising. In this paper, we show that we can achieve the desirable supply chain coordination through using combined quantity discount and advertising cost sharing contracts. We also consider the win-win situation for all the members of the supply chain.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 2911 | Reviews: 0

 
9.

Supplier evaluation in manufacturing environment using compromise ranking method with grey interval numbers Pages 393-402 Right click to download the paper Download PDF

Authors: Prasenjit Chatterjee, Rupsa Chatterjee

DOI: 10.5267/j.ijiec.2011.12.007

Keywords: Grey interval number, Multi-criteria decision making Compromise ranking, Supplier selectio

Abstract:
Evaluation of proper supplier for manufacturing organizations is one of the most challenging problems in real time manufacturing environment due to a wide variety of customer demands. It has become more and more complicated to meet the challenges of international competitiveness and as the decision makers need to assess a wide range of alternative suppliers based on a set of conflicting criteria. Thus, the main objective of supplier selection is to select highly potential supplier through which all the set goals regarding the purchasing and manufacturing activity can be achieved. Because of these reasons, supplier selection has got considerable attention by the academicians and researchers. This paper presents a combined multi-criteria decision making methodology for supplier evaluation for given industrial applications. The proposed methodology is based on a compromise ranking method combined with Grey Interval Numbers considering different cardinal and ordinal criteria and their relative importance. A ‘supplier selection index’ is also proposed to help evaluation and ranking the alternative suppliers. Two examples are illustrated to demonstrate the potentiality and applicability of the proposed method.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 2678 | Reviews: 0

 
10.

A fuzzy mixed integer linear programming model for integrating procurement-production-distribution planning in supply chain Pages 403-412 Right click to download the paper Download PDF

Authors: Alireza Pourrousta, Saleh Dehbari, Reza Tavakkoli-Moghaddam, Amir Imenpour, Mahdi Naderi-Beni

DOI: 10.5267/j.ijiec.2011.12.006

Keywords:

Abstract:
In this paper, we study a supply chain problem where a whole seller/producer distributes goods among different retailers. Such problems are always faces with uncertainty with input data and we have to use various techniques to handle the uncertainty. The proposed model of this paper considers different input parameters such as demand, capacity and cost in trapezoid fuzzy forms and using two ranking methods, we handle the uncertainty. The results of the proposed model of this paper have been compared with the crisp and other existing fuzzy techniques using some randomly generated data. The preliminary results indicate that the proposed models of this paper provides better values for the objective function and do not increase the complexity of the resulted problem.
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Journal: IJIEC | Year: 2012 | Volume: 3 | Issue: 3 | Views: 3417 | Reviews: 0

 
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