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Growing Science » International Journal of Industrial Engineering Computations

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

Multiple characteristics optimization in machining of GFRP composites using Grey relational analysis Pages 511-520 Right click to download the paper Download PDF

Authors: Arun Kumar Parida, Rajesh Kumar Bhuyan, Bharat Chandra Routara

DOI: 10.5267/j.ijiec.2014.8.001

Keywords: ANOVA, Grey Relational Analysis, Taguchi Method, Turning

Abstract:
In the present work, a multi-response optimization method is used to optimize the machining parameters in turning of glass fiber reinforced polymer (GFRP) composites. Parameters like spindle speed (N), feed rate (f) and depth of cut (d) are taken to obtain the responses such as surface roughness (Ra) and material removal rate (MRR). Taguchi’s L9 orthogonal array has been used for machining the work-piece. Analysis of variance (ANOVA) has been carried out to check the significant process parameter in a single objective performance characteristic. The multiple performance characteristics have been analysed using Grey relational analysis and an appreciable result has been reported with this approach.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 3049 | Reviews: 0

 
2.

A production inventory model with exponential demand rate and reverse logistic Pages 521-542 Right click to download the paper Download PDF

Authors: Ritu Raj, Naresh Kumar Kaliraman, Shalini Chandra, Harish Chaudhary

DOI: 10.5267/j.ijiec.2014.7.006

Keywords: Imperfect Production, Integrated, Reverse Logistics, Supply Chain

Abstract:
The objective of this paper is to develop an integrated production inventory model for reworkable items with exponential demand rate. This is a three-layer supply chain model with perspectives of supplier, producer and retailer. Supplier delivers raw material to the producer and finished goods to the retailer. We consider perfect and imperfect quality products, product reliability and reworking of imperfect items. After screening, defective items reworked at a cost just after the regular manufacturing schedule. At the beginning, the manufacturing system starts produce perfect items, after some time the manufacturing system can undergo into “out-of-control” situation from “in-control” situation, which is controlled by reverse logistic technique. This paper deliberates the effects of business strategies like optimum order size of raw material, exponential demand rate, production rate is demand dependent, idle times and reverse logistics for an integrated marketing system. Mathematica is used to develop the optimal solution of production rate and raw material order for maximum expected average profit. A numerical example and sensitivity analysis is illustrated to validate the model.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 2960 | Reviews: 0

 
3.

A hybrid QFD-based approach in addressing supplier selection problem in product improvement process Pages 543-560 Right click to download the paper Download PDF

Authors: Mehdi Rajabi Asadabadi

DOI: 10.5267/j.ijiec.2014.7.005

Keywords: HOQ, MCDM, QFD, Supplier Selection

Abstract:
This paper is about creating a hybrid QFD-based approach in which the best supplier is selected considering changing customer needs. In most previous studies employing a QFD approach, the possibility of changing customer needs is ignored. On the other hand, supplier selection is a challenging problem that could have been addressed by such a QFD. This paper attempts to create a hybrid QFD-based approach in which the internal relations between the elements are considered. It connects the new QFD to suppliers’ qualifications to create a hybrid supplier selection process. The best suppliers are selected based on the priorities of customer needs for each level of the product improvement plan. When a product is to be developed, the proposed methodology seems to create an efficient solution for supplier selection problem with respect to quality factors.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 3358 | Reviews: 0

 
4.

A simulation study on the performance of the sign test, Mann-Whitney test, Hodges-Lehmann estimator and control charts for Normal and Weibull data Pages 561-574 Right click to download the paper Download PDF

Authors: Vadhana Jayathavaj, Adisak Pongpullponsak

DOI: 10.5267/j.ijiec.2014.7.004

Keywords: Hodges-Lehmann estimator, Mann-Whitney, Normal distribution, Sign test, Statistical process control, Weibull distribution

Abstract:
The new method to chart the Hodges-Lehmann estimator control chart is proposed in this study. The evaluation of the three nonparametric control charts - the Sign test (ST), Mann-Whitney (MW), and the Hodges-Lehmann estimator (HL), for the known process distribution using normal and Weibull data represent the symmetric and asymmetric shapes of the process based on the original method through the 10000 run lengths simulation. The result illustrates that the average run length performance of the ST and MW correspond to their respective test statistics but for HL’s performance, the result indicates that the average run length is much greater than that derived from Wilcoxon signed rank statistics. The Hodges-Lehmann estimator control chart by the new approach for the known process distribution will be the alternative method for the process that needs to robust outliers’ properties from this statistics. In addition, the simulation demonstrates that the performances of the Sign test (ST) from mean and median processes are varied in the skewed distribution, and moreover, the Sign test (ST) from the median process represents more accurate performance. Meanwhile, for the control groups, MW generated within control limits or without restriction shows slightly different performance. The performance of dual scheme for the above-mentioned variable parameters control charts also produce the weighted average values that effect from the tight control scheme to the regular control scheme.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 3474 | Reviews: 0

 
5.

A production inventory model with flexible manufacturing, random machine breakdown and stochastic repair time Pages 575-588 Right click to download the paper Download PDF

Authors: S.R. Singh, Leena Prasher

DOI: 10.5267/j.ijiec.2014.7.003

Keywords: Stochastic machine breakdown, Stochastic repair time, Stock dependent demand, Volume flexible manufacturing system

Abstract:
This paper derives a production inventory model over infinite planning horizon with flexible but unreliable manufacturing process and the stochastic repair time. Demand is stock dependent and during the period of sale it depends on reduction on selling price. Production rate is a function of demand and reliability of the production equipment is assumed to be exponentially decreasing function of time. Repair time is estimated using uniform probability density function. The objective of the study is to determine the optimal policy for production system, which maximizes the total profit subject to some constraints under consideration. The results are discussed with a numerical example to illustrate the theory.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 2677 | Reviews: 0

 
6.

Coordination policy for a three echelon supply chain considering imperfect quality items Pages 589-602 Right click to download the paper Download PDF

Authors: Narayan Singh, Bindu Vaish, S. R. Singh

DOI: 10.5267/j.ijiec.2014.7.001

Keywords: Backlogging, Imperfect production process, Three echelon supply chain

Abstract:
In this study, we develop a three echelon supply chain model for items to determine the optimal reliability and production rate, which achieves the biggest total integrated profit for an imperfect manufacturing process. Here, we have taken a supplier, a manufacturer and a retailer in which supplier supplies raw materials to manufacturer, manufacturer produces perfect and imperfect quality items because practically it happens and manufacturer supplies perfect quality items to the retailers. In production system, production facility may shift from an in-control state to an out-of-control state at any random time. The basic assumption of classical economic manufacturing quantity model is that all manufacturing items are of perfect quality but the assumption is not true in practice. The proposed study is formulated assuming that a certain percent of total product is defective. This percentage also varies with production rate and production run time. The defective items are restored in original quality by reworked at some costs to maintain the quality of products in a competitive market. Finally, numerical example and its graphical representation are given to illustrate the proposed model. Sensitivity analysis is also provided to test feasibility of the model.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 1967 | Reviews: 0

 
7.

A simulation optimization approach to apply value at risk analysis on the inventory routing problem with backlogged demand Pages 603-620 Right click to download the paper Download PDF

Authors: Mohammad Abdollahi, Meysam Arvan, Aschkan Omidvar, Fatemeh Ameri

DOI: 10.5267/j.ijiec.2014.6.003

Keywords: Financial Risk Management, Inventory Routing Problem, Risk Averse Distributor, Simulation Optimization, Value at Risk

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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 2746 | Reviews: 0

 
8.

Optimal dynamic pricing and replenishment policies for deteriorating items Pages 621-630 Right click to download the paper Download PDF

Authors: Masoud Rabbani, Nadia Pourmohammad Zia, Hamed Rafiei

DOI: 10.5267/j.ijiec.2014.6.002

Keywords: Advertisement, Dynamic pricing, Replenishment, Time-dependent deterioration rate

Abstract:
Marketing strategies and proper inventory replenishment policies are often incorporated by enterprises to stimulate demand and maximize profit. The aim of this paper is to represent an integrated model for dynamic pricing and inventory control of deteriorating items. To reflect the dynamic characteristic of the problem, the selling price is defined as a time-dependent function of the initial selling price and the discount rate. In this regard, the price is exponentially discounted to compensate negative impact of the deterioration. The planning horizon is assumed to be infinite and the deterioration rate is time-dependent. In addition to price, the demand rate is dependent on advertisement as a powerful marketing tool. Several theoretical results and an iterative solution algorithm are developed to provide the optimal solution. Finally, to show validity of the model and illustrate the solution procedure, numerical results are presented.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 2843 | Reviews: 0

 
9.

Selection of industrial robots using the Polygons area method Pages 631-646 Right click to download the paper Download PDF

Authors: Mortaza Honarmande Azimi, Houshang Taghizadeh, Nasser Fegh-hi Farahmand, Jafar Pourmahmoud

DOI: 10.5267/j.ijiec.2014.6.001

Keywords: Multi-attribute Decision Making (MADM), Polygons Area Method (PAM), SAW, TOPSIS, VIKOR, WPM

Abstract:
Selection of robots from the several proposed alternatives is a very important and tedious task. Decision makers are not limited to one method and several methods have been proposed for solving this problem. This study presents Polygons Area Method (PAM) as a multi attribute decision making method for robot selection problem. In this method, the maximum polygons area obtained from the attributes of an alternative robot on the radar chart is introduced as a decision-making criterion. The results of this method are compared with other typical multiple attribute decision-making methods (SAW, WPM, TOPSIS, and VIKOR) by giving two examples. To find similarity in ranking given by different methods, Spearman’s rank correlation coefficients are obtained for different pairs of MADM methods. It was observed that the introduced method is in good agreement with other well-known MADM methods in the robot selection problem.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 2703 | Reviews: 0

 
10.

Application of multi-stage Monte Carlo method for solving machining optimization problems Pages 647-659 Right click to download the paper Download PDF

Authors: Miloš Madić, Marko Kovačević, Miroslav Radovanović

DOI: 10.5267/j.ijiec.2014.7.002

Keywords: Machining, Meta-heuristics, Monte Carlo method, Multi-stage, Optimization

Abstract:
Enhancing the overall machining performance implies optimization of machining processes, i.e. determination of optimal machining parameters combination. Optimization of machining processes is an active field of research where different optimization methods are being used to determine an optimal combination of different machining parameters. In this paper, multi-stage Monte Carlo (MC) method was employed to determine optimal combinations of machining parameters for six machining processes, i.e. drilling, turning, turn-milling, abrasive waterjet machining, electrochemical discharge machining and electrochemical micromachining. Optimization solutions obtained by using multi-stage MC method were compared with the optimization solutions of past researchers obtained by using meta-heuristic optimization methods, e.g. genetic algorithm, simulated annealing algorithm, artificial bee colony algorithm and teaching learning based optimization algorithm. The obtained results prove the applicability and suitability of the multi-stage MC method for solving machining optimization problems with up to four independent variables. Specific features, merits and drawbacks of the MC method were also discussed.
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Journal: IJIEC | Year: 2014 | Volume: 5 | Issue: 4 | Views: 2670 | Reviews: 0

 

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