Ezatollah Asgharizade; Rahim Ehsani; Farajolah Valipour Halabi
Volume 9, Issue 23 , December 2011, , Pages 21-48
Abstract
Nowadays evaluation system existence is necessary because of wondrous changes in management knowledge. None existence of evaluation system in the different organization dimensions especially in the level of managers is one of the signals that shows the organization problem. The aim of this research is ...
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Nowadays evaluation system existence is necessary because of wondrous changes in management knowledge. None existence of evaluation system in the different organization dimensions especially in the level of managers is one of the signals that shows the organization problem. The aim of this research is combing of 360degree method and technical VIKOR for evaluating performance. The statically society in this research is included from13persons of Research Center managers. Performance evaluation criteria are prepared from expert opinions with Delphi method and visionary basis. Questioner's perpetuity is supported with Cronbach's alpha correlation (0.92). Achieving the managers' suitable ranking is the result of combing 360degree method and technical VIKOR that the capability of it is proved in research center. The total of the subordinates and self-evaluator idea is equal to the superior ideas. Using of the weight stability intervals formula in other MADM technique for criteria weights sensitivity analysis is completely similar with reality decision making environment.
Mohamad Hossein Fazel Zarandi; Solmaz Ghazanfar Ahari; Nader Ghaffari-Nasab
Volume 10, Issue 27 , January 2012, , Pages 22-43
Abstract
Estimating the optimal number of clusters in an unsupervisedpartitioning of data sets has been a challenging area in recent years.These indices usually use two criteria called compactness andseparation to evaluate the efficiency of the performed clustering. Inthis paper a new separation measure for ECAS ...
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Estimating the optimal number of clusters in an unsupervisedpartitioning of data sets has been a challenging area in recent years.These indices usually use two criteria called compactness andseparation to evaluate the efficiency of the performed clustering. Inthis paper a new separation measure for ECAS cluster validity index,proposed by Fazel et al. [1] is identified, which uses Jaccard distancein order to consider the whole shape of clusters. Jaccard distance usesthe size of intersection and union of fuzzy sets, giving the clustervalidity index more information about the overlap and separation ofclusters. This property results in high robustness of the proposed indexdealing with various degrees of fuzziness in comparison with ECAS.To test the efficiency of the proposed index in comparison with nineother indices existing in the literature, 15 data sets (3 existing datasetsand 12 artificial data sets) have been used. Computational resultsindicate robustness and high capability of the proposed index incomparison with previous indices
Mansour Esmaeilzadeh; Amin Hoseinpoor; Mohammad Reza Namdar
Volume 11, Issue 30 , October 2014, , Pages 23-50
Abstract
Inventory classification is one of important techniques in inventory controlcontext. Managers have to classify inventories because of their variety andhigh volume. So a stream of research has been to attempt to find methodsthat increase the management control by determining the number of inventoryclasses. ...
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Inventory classification is one of important techniques in inventory controlcontext. Managers have to classify inventories because of their variety andhigh volume. So a stream of research has been to attempt to find methodsthat increase the management control by determining the number of inventoryclasses. In this paper the multiple objective particle swarm optimizationalgorithm has been used. This algorithm has been presented by Chi-Yang Tsaiand Szu-Wei Yeh in 2008. Multiple objective particle swarm optimization algorithmis an evolutionary algorithm that enables the management to optimizemultiple objectives simultaneously. Minimizing costs of inventory holdingand ordering and maximizing inventory turnover ratios are this model’s objectives.We write the software program of this model and then test it on a sampleof 100 items. Results show that this algorithm can decrease costs of holding &ordering and also increase the inventory turnover ratios significantly.
Marziyeh Karimi,; Seyed hamidreza Pasandideh
Volume 13, Issue 38 , October 2015, , Pages 23-40
Abstract
The newsboy problem is considered as a single period problem which is very common in our real life. This paper study the newsboy problem considering the discount constraint including quantity and incremental and also warehouse space and budget constraint with two objectives of profit and service level ...
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The newsboy problem is considered as a single period problem which is very common in our real life. This paper study the newsboy problem considering the discount constraint including quantity and incremental and also warehouse space and budget constraint with two objectives of profit and service level maximizing. These objectives are designed by an integer non - linear model. This model is solved by using GAMS software and various multi-objective techniques considering this assumption that each product distribution is uniform.Also comparison of methods has been done in tow forms of statistical comparison and multiple decisions.
Nastaran Hajiheydari; Mohammad Bakhtiar Nasrabadi; Hamidreza Esmaili Givi; Mohammad Soltani Delgosha
Volume 6, Issue 17 , September 2007, , Pages 23-47
Abstract
The main purpose of this research is to develop and test a model to enhance our understanding of “How consumers evaluate online and offline channels and how the formation of online and offline purchase intensions and perceived value increase”. In the presented model, service quality, merchandise ...
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The main purpose of this research is to develop and test a model to enhance our understanding of “How consumers evaluate online and offline channels and how the formation of online and offline purchase intensions and perceived value increase”. In the presented model, service quality, merchandise duality and monetary price are considered as the factors that form value for money, and perceived risk. Time / effort cost, enjoyment and value for money are considered as the factors that form channel purchase intension. The study population consists of online and offline customers known bookstores in Tehran. After information collection through Questionnaire and library studies, the Lisrel software was used to analyze data and model. This study is based on Correlation-survey research method (especially structural equation modeling method). The results showed that channel purchase intensions and how consumers evaluate online and offline channels almost form in accordance with the presented model in this study.
Jahanyar Bamdad Soufi; Reza Gharacipour
Volume 8, Issue 19 , December 2010, , Pages 23-52
Abstract
Creating value for stakeholders with maximum productivity is a goal obtained by lean enterprise. In this paper designing comprehensive and valid assessment model is observed for lean enterprise, after reviewing literature and comparing assessment models of lean enterprise to each other, the conceptual ...
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Creating value for stakeholders with maximum productivity is a goal obtained by lean enterprise. In this paper designing comprehensive and valid assessment model is observed for lean enterprise, after reviewing literature and comparing assessment models of lean enterprise to each other, the conceptual research models was designed by considering assessment models of lean enterprise and also APQC framework for classifying the processes in three dimensions: Enablers, Business Processes and Business Results. For this, the three main Iranian automakers Iran khodro, SAIPA and Pars khodro have been assessed by performing a field research through their managers’ viewpoints. Next, the research model and impressing the model dimension on each other have been considered and validated by structural equation modeling. Therefore, it has been used from conformity factor analysis, path analysis and t-value. Shanon Entropy has been used in order to weight the components and variables of the model. The results obtained shows that enablers impress on business results through business processes and there are meaningful relations among them. In addition to impress triple model dimension on each other, their factors have a meaningful relationship with each other. In other words, we cannot achieve the lean enterprise model without making strong links between its factors and components, and it is necessary to create integration within its components and factors.
Adel Azar; Davood Andalib Ardakani; Haidar Mirfakhroddini
Volume 9, Issue 22 , September 2011, , Pages 23-48
Abstract
Nowadays the most important issues considered by the managers of industry is production planning and in this area, managers are faced with several goals that in many cases are in conflict with each other. Operations research techniques, with modeling, while the existing constraints consider, optimize ...
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Nowadays the most important issues considered by the managers of industry is production planning and in this area, managers are faced with several goals that in many cases are in conflict with each other. Operations research techniques, with modeling, while the existing constraints consider, optimize organizational goals. Objectives of all these techniques are raising productivity in the organization. Mathematical model for this research that is made for production planning in Khavar-E-Miane Furniture Co is multiple Objective fractional programming. One of the difficulties in solving the multiple Objective fractional problems is computational problem that arise of variability, in the example Chames and Cooper and Gillmore and Gomory methods there. Hence this research was used fuzzy approach to solve multiple Objective fractional mathematical model of Khavar- E-Miane Furniture Company. Thereby also overcome the computational problems of variability in the previous methods, the relevant officials will be able to optimize their production systems. In this context the first phase, Pal's method was used that using fuzzy goal programming was solved the multiple Objective fractional mathematical model. More using Dutta fuzzy method was determined that the result using both methods is identical and membership functions are equal to =0.701 and //2 =1. It should be noted that other companies also changed slightly in the proposed mathematical model will be able to optimize the production planning.
Mohammad Gholi Yousefi; Asghar Mobarak
Volume 9, Issue 24 , March 2012, , Pages 23-43
Abstract
The purpose of this paper has been to study the main determinants of productivity in manufacturing industries of Iran. The main emphasize has been on the role of institutions .We have used productivity in two digit manufacturing industries based on ISIC classification as dependent variable ,and expenditures ...
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The purpose of this paper has been to study the main determinants of productivity in manufacturing industries of Iran. The main emphasize has been on the role of institutions .We have used productivity in two digit manufacturing industries based on ISIC classification as dependent variable ,and expenditures on R&D, ,Manufactured Exports ,Investment on Manufacturing Industries and Square of employment as Firm Size in addition to Institutions for which we have taken the variables such as number of court litigation documents regarding property rights, security and aggression, transparency in law and order and corruption as explanatory variables for the changes in total factor productivity during the Period 1374-1386.The results show that while the coefficients for all other variables were positive and Significant. The coefficients of Institutions were ,however negative and statistically significant for all the institutional variables, indicating that institutions in Iran reduces opportunity and incentive for industrial investment and thereby acting as important hindrance factors for the growth of industrial productivity.
Seyyed Mojtaba Hashemi Majoumerd; Massoud Kassaee
Abstract
Differentiation through NPD is one of the most effective ways to achieve success. However, because of the failure rate of these projects, it could not be expected firm’ success due to only one new product development project. Therefore, it should be selected a portfolio of new product development ...
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Differentiation through NPD is one of the most effective ways to achieve success. However, because of the failure rate of these projects, it could not be expected firm’ success due to only one new product development project. Therefore, it should be selected a portfolio of new product development projects. In this research by literature review and interview with experts 20 criteria for evaluating new product development projects in disposable medical product extracted. Then by using analytic network process (ANP) based on DEMATEL method degrees of influences given and received among these criteria and also weights for each criteria based on correlation between them calculated. Finally, by evaluating NPD projects with VIKOR method, best portfolio selected. The proposed model is capable of considering complex interrelationship and interdependency between criteria and dimensions for more accurate project selection as well as providing appreciate solutions to improve selected portfolio performance by measuring these interrelationships between criteria and their effective degree and affected degree. The results show that the most important criteria for selecting portfolio of new product development projects are Platform for firm growth and Business-strategy fit.
modeling and simulation
Mohsen JavidMoayed; عباس Toloei Eshlaghy; Mohammad Ali Afshar kazemi
Abstract
Nowadays, more successful businesses are those that keep their customers satisfied and in addition to the macro level of their policies, also pay serious attention to the micro level and details of the market. In this article, in order to study the influential factors in the mobile phone market, the ...
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Nowadays, more successful businesses are those that keep their customers satisfied and in addition to the macro level of their policies, also pay serious attention to the micro level and details of the market. In this article, in order to study the influential factors in the mobile phone market, the dynamic system method with the discrete event method has been used in combination.In this paper, the first two mobile companies Hamrahe Aval and Irancell as the basic players in the Iranian mobile phone market are considered as two rivals. Since in recognizing and analyzing the influential factors on market share, operational and strategic levels affect each other, after specifying the impressive factors at each level, from the discrete event approach at the operational level, and the dynamic system approach at the strategic level and their combination has been used to indicate a compound model of the mobile phone market.Based on findings any change in the operational and strategic levels of each competitor will have a serious influence on the rate of increase / reduce of willingness on their services and the consequently increase or decrease in customers. On the other hand, it indicates how a more specified level of detail can be noticed by combining discrete event simulation methods and a dynamic system.In comparison the suggested combined model investigates more details of events than simple simulation models, so, it can be used to examine different ways for decision-making.
Ali Morovati sharifabadi; Mahsa Namakshenas Jahromi; Alireza Ziaei Bideh
Volume 12, Issue 33 , July 2015, , Pages 25-42
Abstract
The modern world causes increased pollution and environmental problems and governments and organization‘s concerns about the environment and finally creates a concept as green innovation. This paper aims to evaluate the effect of green innovation dimensions on firm performance, ...
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The modern world causes increased pollution and environmental problems and governments and organization‘s concerns about the environment and finally creates a concept as green innovation. This paper aims to evaluate the effect of green innovation dimensions on firm performance, with environmental performance as mediator. The firms in tile and ceramic industry in Yazd province are the target population of this study. This study proposes to evaluate green innovation practices with a particular focus on the managerial, process, product and technology innovation aspects. Structural equation modeling based on PLS method have been used to test the hypothesis. Results showed that green innovation dimensions including green process and technological innovation have significant effect directly on firm performance and also indirectly through the mediator role of environmental performance. Also, green management and product innovation effect only indirectly on firm performance.
Yalda Yahyazade; Laya Olfat; Maghsod Amiri
Abstract
Appropriate management of supply chain is one of the issues facing economic firms that affect all the organizational activities in order to produce the goods and provide the services. Consequently Supplier selection due to involvement of various qualitative and quantitative criteria such as quality, ...
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Appropriate management of supply chain is one of the issues facing economic firms that affect all the organizational activities in order to produce the goods and provide the services. Consequently Supplier selection due to involvement of various qualitative and quantitative criteria such as quality, price, flexibility and delivery times is very difficult and complex and requires accurate and appropriate tools. On the other hand today's competitive environment due to its variable nature, has added the uncertainty and ambiguity in decision-making. The problem of supplier selection is not an exception as well and it seems suitable to use the robust optimization methods in such circumstances. The mentioned method is used in this research with the goal of supplier selecting and determining the amount order of products considering all restrictions in order to minimize the costs and maximize the utility of purchase in the condition of uncertainty. In this paper, a multi-objective deterministic model is presented to solve the problem, and then the deterministic model is converted to the robust model using the scenario-based robust method and then is solved using the LP metric method so optimal amount of order is obtained from each of suppliers at any period. To determine the weight of each of suppliers, Analytical Hierarchy Process (AHP) is used as well.
Gholamreza Khoshsima; Mehdi Ebrahiminejad; Hamidreza Fallah Lajimi
Volume 3, Issue 10 , September 2005, , Pages 25-46
Abstract
In this research at first knowledge management processes and knowledge management effectiveness are surveyed witch use of confirmatory factor analysis then knowledge management processes (from Nonaka's perspective: internalization, externalization, socialization and combination) and knowledge management ...
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In this research at first knowledge management processes and knowledge management effectiveness are surveyed witch use of confirmatory factor analysis then knowledge management processes (from Nonaka's perspective: internalization, externalization, socialization and combination) and knowledge management effectiveness are measured. Then relationships between them are examined by multivariate regression (stepwise) and partial correlation. Results have indicated that only internalization is accomplished at universities of Rafsanjan and three of knowledge management processes include internalization externalization and socialization are implemented and three of knowledge management processes include internalization externalization and combination are affected on knowledge management effectiveness.
Ghasem Ansari Ranani; Mandani Tounkenejad
Volume 6, Issue 15 , March 2007, , Pages 25-50
Abstract
In recent decade many human resource specialist and authors achieve success for aligning and integrating in human resource subsystems. One of these practice developing and formulating competence models as base of human resource development and integrating between training, human resource planning, selection ...
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In recent decade many human resource specialist and authors achieve success for aligning and integrating in human resource subsystems. One of these practice developing and formulating competence models as base of human resource development and integrating between training, human resource planning, selection and others human resource units and subsystems. This research aimed to developing and formulating coherent and local model for National Iranian Oil Company. Because of especial NIOC nature and background and governing of especial managerial systems, applying and using current models cannot responsive to company demands. So, company for developing local model need to use grounded theory approach for exploration of tacit knowledge and applying this knowledge to creation competency model. Based on research result, competency model have 5 dimension and 19 items. After model designing, for validity and reliability confirmation, 74 questionnaires completed by supervisors. Data analysis shows that all dimension and items are valid and suitable for NIOC. Also, based on data analysis process improvement dimension is more important than others in model and human resource dimension was less important.
Mostafa Ekhtiari; Masoud Kasaei
Volume 13, Issue 36 , April 2015, , Pages 27-60
Abstract
Entrepreneurship risks are the most important titles in the implementation process of new businesses, which must be considered by entrepreneurs. Not considering the entrepreneurship risks, can face the new businesses by the hazard of non-realization of the accepted results. But as the risks are associated ...
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Entrepreneurship risks are the most important titles in the implementation process of new businesses, which must be considered by entrepreneurs. Not considering the entrepreneurship risks, can face the new businesses by the hazard of non-realization of the accepted results. But as the risks are associated to uncertainty and the success or failure of the new business is probable, thus a mechanism must be concerned regarding its importance. The target of this study is to survey and prioritize entrepreneurship risks of the Gharzolhasaneh Funds under uncertainty, so that after determining the most important risks, we can consider the safe control acts to decrease their effects. Thus in this paper, a hybrid approach by Todim technique and gray numbers theory is proposed, so that it is used for prioritizing the entrepreneurship risks of Gharzolhasaneh Funds. The obtained results for problem of prioritizing the entrepreneurship risks of Gharzolhasaneh Funds confirm that the most important risk for these institutions is inefficiency of the Funds’ managers and personnel
Laya Olfat; Masoud Barati; Mohammad Reza Valadi
Volume 9, Issue 25 , July 2012, , Pages 27-50
Abstract
Nowadays one of the most important decisions for the companies iswhether to outsource a part of the organizations’ value chain or not.Some studies show that majority of them, consider outsourcing as acost reduction approach, not as a strategic decision. Some researcheshave paid attention to this ...
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Nowadays one of the most important decisions for the companies iswhether to outsource a part of the organizations’ value chain or not.Some studies show that majority of them, consider outsourcing as acost reduction approach, not as a strategic decision. Some researcheshave paid attention to this concept. This paper presents a decisionmaking framework which consists of five criteria, thirty scenarios andeight strategies. According to this framework, activities outsourcingdecisions can be made. This framework has been applied for thirtythree manufacturing sets of Samand automotive. The suggested optionfor twenty six of them is “Supplier Development and Outsourcing”,for five sets is “Insourcing”. “Partial Outsourcing” is suggested forone set and “Spin off” for another one.
M. A'arabi; M. Rahim Zadeh
Volume 2, Issue 5 , June 2004, , Pages 27-47
Maryam Akhavan; Moslem Alimohammadlo; Jafar Habibi
Volume 2, Issue 6 , September 2004, , Pages 27-44
Abstract
Nowadays using Information Technology to overcome rapid environmental changes and adopting flexibility is necessary and inevitable. ...
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Nowadays using Information Technology to overcome rapid environmental changes and adopting flexibility is necessary and inevitable. Yet, implementation ofIT projects in many cases is subject to failure. This research seeks to identify vital elements/factors of success and failure of IT projects in Iran and defining techniques to decrease the rate of failure. These elements/factors have been assessed under two general classifications: infrastructural including technical, human, economic, cultural, and management! administrative factors, and superficial, including size of the organization and the project, To identifying infrastructural factors, expert survey questionnaires has been applied. Results show that administrative/ management-strategic factors, and cultural - social are more important than financial - economic and technological - human factors. And most important of all is the absence of sufficient commitment on the side of senior managers of the organizations and unfamiliarity of people and authorities with the structure and performance 0 f IT. Superficial factors have been analyzed dynamically in two dimensions: size of the organization and the project. The results of the descriptive analysis shows that the larger the organization and the project, the higher the risk of failure.By the end, the conceptual model of the vital elements of success and failure of IT projects has been presented as well as suggestions for successful execution of such projects and future research in this field.
Hasan Shavandi; Mehdi Mardane Khameneh
Volume 8, Issue 20 , March 2011, , Pages 27-48
Abstract
On the networks existing servers and customers, each node indicates a customer demand and demand rate is estimated for them. The edges of the network indicate connective ways among the nods which is usually shown with the distance of two nods or the time of travelling. In the covering location problems, ...
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On the networks existing servers and customers, each node indicates a customer demand and demand rate is estimated for them. The edges of the network indicate connective ways among the nods which is usually shown with the distance of two nods or the time of travelling. In the covering location problems, the objective is locating some of the servers on the network in a way that the customers' demand supported by the maximum covering of the servers and optimized objective criterion. In this research the location model with Probability Structure, which the probability of choosing servers by customer is estimated based on their distance, is developed. In the presented model, supposing there is a competitive market, lost demand is considered, too. And according to the mentioned matter the objective of the model is to minimize the cost of losing demands or to maximize the earned profits of responding to the demands. Then, we propose a genetic algorithm (GA) to solve this model. In addition, we employ design of experiments and response surface methodology to both tune the GA parameters and to evaluate the performance of the proposed method in 45 test problems. The results of the performance analysis show that the efficiency of the proposed GA method is very well.
Adel Aazami; Ahmad Makui
Abstract
In this paper, multi-site aggregate production planning for the production of perishable products such as gifts of New Year, calendars and maturities by postponement policy in uncertainty conditions is determined. The production process for these products is proposed to be divided into two phases including ...
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In this paper, multi-site aggregate production planning for the production of perishable products such as gifts of New Year, calendars and maturities by postponement policy in uncertainty conditions is determined. The production process for these products is proposed to be divided into two phases including the production of final and semi-finished products with applying the concept of postponement. So, there are three production activities, including direct production, the production of semi-finished products and final assembly. Also, a robust optimization model to solve aggregate production planning problem for these products is developed. Finally, a set of real data from a calendar producing company in Tehran called “NIK Calendar” are used to validate and show the efficiency of the proposed model. Results show that the proposed model of this paper can use for similar factories which are active in the field of aggregate production planning with considering uncertainty in the parameters
Hossein Shams Shemirani1; Mahdi Bashiri; Mohammad Modarres
Abstract
In this research, optimization of examinations' timetable for university courses, based on a real problem in one of the universities in Iran is studied. The objective function defined for this problem is more practical and realistic than the other objective functions that have been utilized by previous ...
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In this research, optimization of examinations' timetable for university courses, based on a real problem in one of the universities in Iran is studied. The objective function defined for this problem is more practical and realistic than the other objective functions that have been utilized by previous researchers in literature and effectively reflects the real objective of the problem. In order to define the objective function, we have made use of Coulomb's law in electricity that says the magnitude of the electrostatic force of interaction between two point charges is directly proportional to the scalar multiplication of the magnitudes of the charges and inversely proportional to the square of the distance between them. We have defined a repulsive force between any pair of Examinations. The optimum solution is achieved when the sum of all forces is minimized. Hence, the obtained mathematical model is a non-linear programming with binary variables, similar to the quadratic assignment problem (QAP) which is an NP-Hard problem. This sort of problems can be solved exactly only if they are in small sizes. For solving this problem in medium and large scale, some methods are used based on Simulated Annealing (SA) algorithm and Imperialist Competitive algorithm (ICA). These algorithms can reach good sub-optimal solutions in a short period of time. Practical results of this mathematical model are already used in one of the national universities in Iran. The practical results demonstrate the high efficiency and effectiveness of this model.
Mehdi Ajalli; Ezatollah Asgharizadeh; Hossein Safari; Iman Ghasemian sahebi
Abstract
Competition of today's organizations in the supply chain has increased by growing the level of the competitiveness caused by globalization, and is included all chain members and external organizations. Intra-organizational perspectives about quality have some limitations; therefore, manufacturers should ...
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Competition of today's organizations in the supply chain has increased by growing the level of the competitiveness caused by globalization, and is included all chain members and external organizations. Intra-organizational perspectives about quality have some limitations; therefore, manufacturers should pay attention to inter-organizational approaches of quality such as supply chain quality management (SCQM). SCQM will enable the manufacturing companies to satisfy their customers' needs in a competitive market. In this study, after identifying the structure of supply chain management and quality management operation through comprehensive review of the literature, a comprehensive and conceptual definition about supply chain quality management (SCQM) and finally after studying its dimensions, a conceptual framework with 7 factors are presented. Relationship and sequencing of these factors determined by fuzzy interpretive structural modeling (ISM). In this regard, after the assessment, these factors were placed in five levels. Then the obtained structural model confirmed by using path analysis. The proposed model can help the gas industry in implementation of quality management in their supply chain to achieve competitive advantages and satisfy the customer needs better
Reza Yousefi Zenouz; Reza Olamaie; Somayeh Olamaie
Abstract
Millions of people encounter coronary artery disease annually, and this disease constitutes a large number of patients. Although considerable progress has been made in medical science, but the early detection of this disease is still a challenging issue. The aim of this paper is to describe developing ...
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Millions of people encounter coronary artery disease annually, and this disease constitutes a large number of patients. Although considerable progress has been made in medical science, but the early detection of this disease is still a challenging issue. The aim of this paper is to describe developing a fuzzy expert system that will help to detect CAD at an early stage. Rules were extracted with the aid of doctors and fuzzy approach was taken to cope with the present uncertainty in the medical domain. The results indicate a high level of correct detection of normal and abnormal groups of people. The suggested methodology can help the doctors in medical diagnosis
Seyed Mohammad A'arabi; Parinaz Shoarian
Volume 3, Issue 8 , March 2005, , Pages 29-54
Abstract
Environmental analysis study as an important factor in strategic planning includes monitoring assessment and dissemination of information related to internal and external environment of organization. The analysis of this industry is very essential according to increasing development of software technology ...
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Environmental analysis study as an important factor in strategic planning includes monitoring assessment and dissemination of information related to internal and external environment of organization. The analysis of this industry is very essential according to increasing development of software technology in iran. In order to achieve this goal after studying various models the PEST model have been used to analyses the effecting factors on software industry in iran. In this article on the basis of this model appropriate political social economical and technological factors was identified and studied. The results of which have been presented. Show existing opportunities and threats of this industry that could be used as a basis for the future planning.
Maghsoud Amiri
Volume 3, Issue 9 , June 2005, , Pages 29-40
Abstract
In this paper we used the Markov models eigenvectors and eigen values concdpts to propose a methodology for analyzing the transient reliability of system with the identical components and the identical repairmen. The components of the systems under consideration can have two distinct configurations, ...
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In this paper we used the Markov models eigenvectors and eigen values concdpts to propose a methodology for analyzing the transient reliability of system with the identical components and the identical repairmen. The components of the systems under consideration can have two distinct configurations, namely ; they can be arranged in series, or in parallel. We also consider the third case in which the system is up if k –out –of – n components are good. For all three cases we proposed a procedure for calculating the transient probability of the system availability and the duration of the system to reach to the steady state are described.
