Journal of System Management: 4 (3)

Open Access Article

1 - A Genetic Algorithm with Modified Crossover Operator for a Two-Agent Scheduling Problem
Maziyar Yazdani Fariborz Jolai

The problem of scheduling with multi agent has been studiedfor more than one decade and significant advances have been madeover the years. However, most work has paid more attention to the conditionthat machines are available during planning horizon. Motivatedby the obs More

The problem of scheduling with multi agent has been studiedfor more than one decade and significant advances have been madeover the years. However, most work has paid more attention to the conditionthat machines are available during planning horizon. Motivatedby the observations, this paper studies a two-agent scheduling modelwith multiple availability constraint. Each agent aims at minimizing afunction which depends only on the completion times of its jobs. Theproblem is to find a schedule that minimizes the objective function ofone agent, subject to the objective function of the other agent does notexceed a given threshold Q. some new dominance properties for thisproblem percent and next, using these properties, we develop a geneticalgorithm with modified crossover for the problem. Computational resultsare also presented to determine the performance of the proposedgenetic algorithms. Manuscript profile

Open Access Article

2 - Designing and implementation of a fuzzy-dynamic model to evaluate system’s risk and reliability
Majid VaziriSarashk Sohrab KhanMohammadi Mahmood Alborzi Seyed Mohammad Seyed Hoseini

The purpose of this article is to permit the system safetyand reliability analysts to evaluate the criticality or risk associated withitem failure modes. The factors considered in traditional failure modeand effect analysis (FMEA) for risk assessment are frequency of oc More

The purpose of this article is to permit the system safetyand reliability analysts to evaluate the criticality or risk associated withitem failure modes. The factors considered in traditional failure modeand effect analysis (FMEA) for risk assessment are frequency of occurrence(O), severity (S) and detectability (D) of an item failure mode.Because of the subjective, qualitative and dynamic nature of the informationand to make the analysis more consistent and logical, an approachusing fuzzy logic and system dynamics methodology is proposed. In the proposed approach, severity is replaced by dependency parameterthen, these parameters are represented as members of a fuzzy setfuzzified by using appropriate membership functions and are evaluatedin fuzzy inference engine, which makes use of well-defined rule base andfuzzy logic operations to determine the value of parameters related tosystem’s transfer functions. The fuzzy conclusion is then defuzzified toget transfer function for risk and failure rate. The applicability of theproposed approach is investigated with the help of an illustrative casestudy from the automotive industry. The results provide an alternatesolution to that obtained by the traditional method. The suggested assessmentmodel was developed using toolbox platform of MATLAB 6.5R.13. Manuscript profile

Open Access Article

3 - Profitability and Effectiveness by Means Two Stage DEA Model in Iranian Bank
Morteza Shafiee

The purpose of this paper is to provide a frameworkfor evaluating the overall performance of bank branches in terms ofprofitability efficiency and effectiveness. Ioannis E.Tsolas (2010) introduced“Modeling Bank Branch Profitability and Effectiveness by MeansDEA&rd More

The purpose of this paper is to provide a frameworkfor evaluating the overall performance of bank branches in terms ofprofitability efficiency and effectiveness. Ioannis E.Tsolas (2010) introduced“Modeling Bank Branch Profitability and Effectiveness by MeansDEA”. But this study has several problems regarding modeling and theresults it claims to be withstanding. In 2010 Kumer and Gulati introduceda model for performance evaluation. But this study also has aproblem with regard to modeling. We can say that the model introducedin Tsolas, Kumer and Gulati‘s studies was already introduced byHo and Zhu (2004) and Ho (2007). This paper tries to take a close lookat these problems and offer a solution to modify it in a more practicalmodel. First, we analyze the Ho and Zhu (2004) Ho (2007), Tsolas(2010), Kumer and Gulati‘s (2010) model and prove them to be incorrect.Then we apply a modified two stage model proposed by Chen,Liang and Zhu (2009) in bank branches in Iran. This study aggregatesprofitability efficiency and effectiveness into overall performance. In Hoand Zhu (2004) Ho (2007), Tsolas (2010), Kumer and Gulati‘s (2010)studies, they assume that profitability efficiency and effectiveness areindependent, and with that assumption, they design a two stage DEAmodel. We show that this assumption is wrong, and we cannot designa two stage DEA model with this assumption. There are some relationsbetween profitability efficiency and effectiveness which are very important.Without considering these relations we cannot obtain a superiorinsight about the overall performance. Finally, we show that the resultsof the modified model are proved to be more accurate than those ofTsolas, Kumer and Gulati‘s model. This study shows the importance ofprofitability efficiency and effectiveness in overall performance of bankbranches in Iran. Manuscript profile

Open Access Article

4 - An Approach to Selecting a Suitable Supplier
Hojjatollah Hamidi

Supplier performance measurement has attracted much attentionfrom researchers. In the supply chain concept, supplier performancemeasurement results reveal the effects of methods and potentialopportunities for selection improvement. Performance measurement isan indispens More

Supplier performance measurement has attracted much attentionfrom researchers. In the supply chain concept, supplier performancemeasurement results reveal the effects of methods and potentialopportunities for selection improvement. Performance measurement isan indispensable management tool. This paper presents a fuzzy decisionmaking approach to supplier selection problem. Many quantitativeand qualitative factors such as quality, and flexibility and delivery performancemust be considered to determine suitable suppliers. In thispaper, linguistic values are used to assess the weights for these factors.Evaluations have been carried out to assess particularly the effectsof suitable suppliers on the supply chain service. An approach to improvesuitable supplier performance in an unsuitable environment hasbeen analyzed. Manuscript profile

Open Access Article

5 - An Uncertain Time Horizon Inventory Management Model with Partial Backlogging Considering Deterioration Cost
Sara Nodoust Aboulfazl Mirzazadeh

A new mathematical model for the optimal production isformulated for the inventory management system under time-varyingand stochastic inflation environment for deteriorating items. The timehorizon is finite and demand rate is dependent to the inflation. In thereal situa More

A new mathematical model for the optimal production isformulated for the inventory management system under time-varyingand stochastic inflation environment for deteriorating items. The timehorizon is finite and demand rate is dependent to the inflation. In thereal situation, some but not all customers will wait for backlogged itemsduring a shortage period, such as for fashionable commodities or hightechproducts with the short product life cycle. The longer the waitingtime is, the smaller the backlogging rate would be. According tosuch phenomenon, taking the backlogging rate into account is necessary.Thus, the model incorporates partial backlogging. The total systemcost including deterioration cost, production cost, inventory holdingcost, backordering cost, lost sale cost and ordering cost is formulated asan optimal control problem. The numerical example has been providedfor evaluation and validation of the theoretical results. Manuscript profile

Open Access Article

6 - Introduce a Solution for Optimizing Interactive Genetic Algorithm to Increase Productivity
Maryam Sadri Marjan Sohrabfar Mona Ashghali Farahani

The Unequal Area Facility Layout Problem (UA-FLP)made using different methods to measure the quantity used. The plantfeatures UA-FLP enhance productivity and can reduce between “20%”to “50%” of total operating costs. In this regard, an Interactiv More

The Unequal Area Facility Layout Problem (UA-FLP)made using different methods to measure the quantity used. The plantfeatures UA-FLP enhance productivity and can reduce between “20%”to “50%” of total operating costs. In this regard, an Interactive GeneticAlgorithm (IGA) is presented that allows the Decision Maker (DM) tointeract with the algorithm. In this method, the DM is to find the bestand most appropriate solution. DM to avoid overloading, populationclassified into clusters and each cluster represents only one element isevaluated directly by the DM. But the problem is that the DM processto achieve the best result must pass many generations and it causes highexhaustion DM. The algorithm presented in this paper will reduce thewear on the DM. A memory of the best solutions chosen by the DM iskept as a reference. An interactive genetic algorithm is presented ableto take advantage of the DM. Manuscript profile

Open Access Article

7 - Supervision and Evaluation Role in Higher Education Effectiveness
Seyed Ahmad Hashemi

Educational supervision and evaluation is a mechanismwhich seeks to improve and correct learning process in all aspects andwill lay the foundation for continuous improvement in education quality.The nature of supervision and evaluation is related to all the factorsand i More

Educational supervision and evaluation is a mechanismwhich seeks to improve and correct learning process in all aspects andwill lay the foundation for continuous improvement in education quality.The nature of supervision and evaluation is related to all the factorsand individuals involved in educational system and deals with the supervisionof physical situations and the improvement of contents, methods,etc. Therefore, developing the view of effective use of all factorsin appropriate evaluation in higher educational system leads to longtermachievement and will gradually create revolution in higher education.This demands applying a correction, supervision, and evaluationprocess. In this literature, with regard to the importance of supervisionand evaluation and its effects on education and educational supervisionbalance, we seek the role of supervision and evaluation and its effectivenesson higher education using an analytical and descriptive method. Manuscript profile

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