Hamidreza Feili | Karaj Islamic Azad University Of Iran (original) (raw)
Papers by Hamidreza Feili
Kuwait Chapter of Arabian Journal of Business and Management Review, 2014
This essay has been provided based on development of procedures to use human sources in service s... more This essay has been provided based on development of procedures to use human sources in service systems. In order to analyze the system, the combining approach of optimization, simulation and GERT networks are used. This approach, which is used in this essay, has the capability of development and being used in all administrative centers. By use of these approaches of multiple analyses, can reach to higher speed and efficiency, at service systems .In this research, by combination of optimization, simulation and GERT networks procedures to increase the customers' satisfaction and accepting the competition of public service centers, are used. This has been done in 3 steps. First, simulation is used to specify the optimized number of human forces .Second, GERT networks are used to decrease the waiting time at the system by use of human forces that are more efficient, exact and quick .This procedure has been used in customers' center in one of telecommunication centers. Analysis of results of simulation in first and second step are gained based on variables: time duration of waiting in queue, number of operators, customers' affairs centers budget and optimized number of human forces. GERT networks also are made by variables of Node (problems) value and relations of different sections. The resulted gained from simulation and GERT networks are provided in form of a proposal to the manager in order to have better performance of human forces. Both simulation and GERT networks can be used to increase the systems permanency and reduce waiting time of system, and reach a suitable performance improvement. This approach can help significantly to the systems' structuring and promotion of such system performance.
Journal of System Management, Oct 1, 2016
Journal of Industrial and Systems Engineering, 2018
Wheat is one of the most strategic agricultural products, which has always been a significant iss... more Wheat is one of the most strategic agricultural products, which has always been a significant issue for the government. The main purpose of this study is to review the policy of purchasing wheat on the welfare of producers and customers in Iran. Due to the significance of wheat in consuming model of Iranian families, this product has been permanently under consideration. The government grants a subsidy to wheat consumption within the framework of inexpensive food policy and implements price setting support policies, a subsidy to products and insurance for wheat production. Furthermore, it is the exclusive buyer and seller of wheat in the country. Considering endurance of performance and ever-increasing expenses for the supporting plans for wheat producers and consumers, our goal in this paper is to evaluate and study the impact of such policies on the welfare of producers and consumers. To gain such objective, a mathematical model has been developed. The fulfilled policies in the pe...
Journal of Industrial and Systems Engineering, 2018
In an era that in which the economy is in the core of knowledge aspect, knowledge is considered ... more In an era that in which the economy is in the core of knowledge aspect, knowledge is considered as a vital factor in maintaining the sustained competitive advantage of organizations. Today, the art and skill of management in organizations is moving towards changing into the art of "knowledge management"; and, leadership means providing suitable conditions and grounds in producing valuable knowledge via human force thought, and performing this task in a way that would encourage individuals in undertaking personal responsibility. The leadership factor plays a key role in successful implementation of knowledge management in enterprises and organizations; thus, in the present research, the authors have studied the relationship between knowledge management and leadership style as well as defining empowerment leadership style in knowledge management. The statistical population considered in this research consists of employees of Iran Export Credit Insurance Institute. The prese...
This paper studies the opportunities for deploying IT in rural medical centers and uses SWOT matr... more This paper studies the opportunities for deploying IT in rural medical centers and uses SWOT matrix to identify influencing factors on the plan or organization. Strategies are formulated based on internal and external factors of SWOT matrix. Next, strategies are ranked which is not possible by SWOT matrix alone and the matrix solely defines the effect of influencing factors on organization and then strategies. Fuzzy ANP method is used to prioritize strategies so that strategies for deployment of IT in rural medical centers would be prioritized properly. INTRODUCTION Nowadays, we are seeing immigration of villagers to urban areas. This immigration could have several reasons, such as low medical, educational and welfare service rate or shortage or lack of basic products or shortage of job opportunities in villages. %30 of Iran population are villagers thus, this issue requires more attention to be solved. In case of provision of medical, educational, cultural, economic services to vil...
RAIRO - Operations Research
Integrating strategic and tactical decisions to location-allocation and green inventory planning ... more Integrating strategic and tactical decisions to location-allocation and green inventory planning by considering e-commerce features will pave the way for supply chain managers. Therefore, this study provides an effective framework for making decisions related to different levels of the dual-channel supply chain. We provide a bi-objective location-allocation-inventory optimization model to design a dual-channel, multi-level supply chain network. The main objectives of this study are to minimize total cost and environmental impacts while tactical and strategic decisions are integrated. Demand uncertainty is also addressed using stochastic modeling, and inventory procedure is the periodic review . We consider many features in inventory modeling that play a very important role, such as lead time, shortage, inflation, and quality of raw materials, to adapt the model to the real conditions. Since a dual-channel supply chain is becoming more important for sustainable economic development a...
Quality of bread, as one of the most important foodstuff, can be improved by applying advanced in... more Quality of bread, as one of the most important foodstuff, can be improved by applying advanced instruments and technology, composite flour and different kinds of ingredients like emulsifiers and acidic food additives.Implementation of food safety measures and application of quality management systems will reduce microbial and chemical hazards. This study aimed to improve industrial bread production through different approaches regarding customers’ and technical requirements. Fuzzy Quality Function Deployment (FQFD) as a quality management tool deals with improving quality factors, optimizing technological costs and increasing market size considering technical and customer requirements. Fuzzy nalytical Hierarchy Process (FAHP) results in cost decline, efficiency enhancement and effectiveness of economical index in the mentioned systems. Through FQFD and FAHP, requirements of developing industrial bread production such as responsible components of quality, hygiene and safety and also ...
International Journal of Productivity and Quality Management
In many statistical process monitoring (SPM), quality of process or product describes by a relati... more In many statistical process monitoring (SPM), quality of process or product describes by a relationship between one or more predictor variable(s) and a nominal response variable called nominal logistic regression profile (NLRP). In this paper, two control charts including Wald and Rao score test (RST) is developed to monitor NLRP in Phase II. In addition, to evaluate the parameter estimation effect on the performance of control charts, maximum likelihood estimation (MLE) is developed in Phase I. Performance of the proposed control charts are evaluated using some simulation studies and results show that Wald control chart has better performance than RST chart under different shifts in NLRP parameters. Furthermore, to show the efficiency of the proposed approaches in real application, a case study in health-care is applied. Real case results is also showed that Wald control chart has better performance in faster detecting the out-of-control condition.
For each power system, functional reliability must be set in order to meet consumers demand for e... more For each power system, functional reliability must be set in order to meet consumers demand for energy following by reasonable costs. So power system managers must optimize their costs of the system. When the mechanical equipment is put into operation, its performance will degenerate with the increases of operation time and different type of failures may happen which can decrease the percent efficiency of the system. On the other hand in each system, there might be some predetermined basic repairs which can affect the reliability of the system. In this article, a simulation model for failures, maintenance, and repair of a thermal power plant is presented. This model can be applied for determining different scenarios, analyzing maintenance planning and scheduling basic repairs.
European Journal of Economics Finance and Administrative Sciences, 2012
In this paper, the researchers have tried to find a suitable combination of human resources at on... more In this paper, the researchers have tried to find a suitable combination of human resources at one of the banks of the Islamic Republic of Iran with regard to service quality determinants using combined simulation approach and MCDM. In the first step, after reviewing the literature and interviewing the experts, the key determinants of service quality, from the viewpoint of stakeholders, were identified. In the second step, after considering different limitations, various executable scenarios of combination of human resources for improving quality of service were determined through consulting the experts. Then, the value of some of the quality attributes in various scenarios was determined by the experts and some other was predicted using simulation techniques; and finally, based on all the attributes and using TOPSIS technique, possible scenarios were compared and rated.
International Journal of Applied Mathematics and Computer Science, 2011
In this paper we debate on the causes of dissatisfactory of academic studies of marketing models.... more In this paper we debate on the causes of dissatisfactory of academic studies of marketing models. Next, we present a more complete methodology for knowledge discovery in data bases to be used in marketing causal modelling as a decision support tool in marketing management .This methodology is based on genetic fuzzy systems, a specific hybridization of artificial intelligence methods, that is proper for the problems we offer. Marketing intelligence system is called knowledge based marketing management support systems that is an avant-garde evolution in the use of KDD methods based on intelligence systems like this in our paper. The KDD process creates some basic questions for the professionals in this case that are completely discussed and solved next .After the theoretical presentation, this methodology is experimented on a consumer modelling application in interactive computer-mediated environments.
International Journal of Applied Mathematics and Computer Science, 2011
The degree of effectiveness of information technology (IT) in industry and the way it aids organi... more The degree of effectiveness of information technology (IT) in industry and the way it aids organizational goals are considered as very key sensitive points in industry's communications and interactions in the worldwide scale. In fact information technology has got various functions in different sectors of industry most of which are not simply quantifiable. Usually a large quantity of the information we deal with in industrial atmospheres are ambiguous and in a way fuzzy. That's why it makes it almost impossible to utilize common ways of decision-making in this area. In this research due to integrity of decision-making approach, evaluation of information technology will be based on FAHP and BSC approaches. Ways forward for BSC to express organizational hierarchy are divided into four main sections (financial, buyer, the function's internal process, and training & rate of progress). These factors are considered as functional indicators for each section to be evaluated. The FAHP approach here is mainly advised to be used to clarify the ambiguity of the information. In conclusion this integrated methodology facilitates planning in information systems and gives some clues to create a viable system of information technology in industry. That means provision of ways forward for improvements in performance of information technology in Industries.
International Journal of Renewable Energy Research, Dec 25, 2012
Saffron is the most expensive spice and is highly valuable for non-oil export. Drying process is ... more Saffron is the most expensive spice and is highly valuable for non-oil export. Drying process is a critical control point with major effects on chemical and microbiological characteristics, so an appropriate drying method shall meet standard and market requirements as well as cost benefit. Different methods include traditional, freeze, solar, vacuum oven and microwave drying. Solar drying is performed in direct or indirect way. In the 1st way, sunlight is directly exposured with product chamber, while in the later, sun light is stored in solar collectors and then warm air flow is pumped to product chamber. Results by spectroscopy for colour agent (Crocin), odour agent (Saffranal) and flavour agent (Picrocrocin) indicated that solar drying represents high values. Moisture content taken as a key factor of dehydration was detected below permitted standard level. Microbiological profile in solar drying was in compliance with standard and in acceptable level. Optimum drying condition was achieved for 6-6.5 hours in 35-45 o C. Since all microbial safety and chemical quality properties of saffron are preserved in solar drying and also considering energy saving and the resulted cost benefit of this system, it could be introduced as an appropriate drying method in producing rural and collecting sites of saffron.
Various modeling techniques based on possibility distribution function has been applied successfu... more Various modeling techniques based on possibility distribution function has been applied successfully in a wide range of issues related to production planning. However, the possibility distribution function derived from the records recorded in the organization are not always available or changes in production environment may cause a variety of changes and volatilities in model and make it unreliable; changes such as: market demand, changes in types of production costs, capacity, resources, and administrative constraints. In this study fuzzy sets theory has been combined with material requirements planning (MRP). It is noteworthy that material requirements planning (MRP) is one of the most commonly used subdivision of production planning that combining it with fuzzy theory can be applied to develop decision making systems and make them more efficient. In addition, the uncertainties of industrial environments can be exerted properly into the production decision-making.
International Journal of Applied Mathematics and Computer Science
This paper models supply chain uncertainties by fuzzy sets and develops a fuzzy linear programmin... more This paper models supply chain uncertainties by fuzzy sets and develops a fuzzy linear programming model for tactical supply chain planning in a multi-echelon, multi-product, multi-stage with different methods of manufacturing in each stage, multi-distribution centre and multi-period supply chain network. In this approach, the demand, process and supply uncertainties are jointly considered. The aim is to achieve the best use of the available resources and the best method of manufacturing at each stage for a product along the time horizon so that customer demands are met at a minimum cost. The fuzzy model provides the decision maker with alternative decision plans with different degrees of satisfaction.
International Journal of Applied Mathematics and Computer Science
In this article it has been tried to show that fuzzy theory performs better than probability theo... more In this article it has been tried to show that fuzzy theory performs better than probability theory in monitoring the product quality. A method that uses statistical techniques to monitor and control product quality is called statistical process control (SPC), where control charts are test tools frequently used for monitoring the manufacturing process. In this study, statistical quality control and the fuzzy set theory are aimed to combine. As known, fuzzy sets and fuzzy logic are powerful mathematical tools for modeling uncertain systems in industry, nature and humanity; and facilitators for common-sense reasoning in decision making in the absence of complete and precise information. In this basis for a textile firm for monitoring the yarn quality, control charts according to fuzzy theory by considering the quality in terms of grades of conformance as opposed to absolute conformance and nonconformance. And then with the same data for a textile factory, the control chart based on pr...
Kuwait Chapter of Arabian Journal of Business and Management Review, 2014
This essay has been provided based on development of procedures to use human sources in service s... more This essay has been provided based on development of procedures to use human sources in service systems. In order to analyze the system, the combining approach of optimization, simulation and GERT networks are used. This approach, which is used in this essay, has the capability of development and being used in all administrative centers. By use of these approaches of multiple analyses, can reach to higher speed and efficiency, at service systems .In this research, by combination of optimization, simulation and GERT networks procedures to increase the customers' satisfaction and accepting the competition of public service centers, are used. This has been done in 3 steps. First, simulation is used to specify the optimized number of human forces .Second, GERT networks are used to decrease the waiting time at the system by use of human forces that are more efficient, exact and quick .This procedure has been used in customers' center in one of telecommunication centers. Analysis of results of simulation in first and second step are gained based on variables: time duration of waiting in queue, number of operators, customers' affairs centers budget and optimized number of human forces. GERT networks also are made by variables of Node (problems) value and relations of different sections. The resulted gained from simulation and GERT networks are provided in form of a proposal to the manager in order to have better performance of human forces. Both simulation and GERT networks can be used to increase the systems permanency and reduce waiting time of system, and reach a suitable performance improvement. This approach can help significantly to the systems' structuring and promotion of such system performance.
Journal of System Management, Oct 1, 2016
Journal of Industrial and Systems Engineering, 2018
Wheat is one of the most strategic agricultural products, which has always been a significant iss... more Wheat is one of the most strategic agricultural products, which has always been a significant issue for the government. The main purpose of this study is to review the policy of purchasing wheat on the welfare of producers and customers in Iran. Due to the significance of wheat in consuming model of Iranian families, this product has been permanently under consideration. The government grants a subsidy to wheat consumption within the framework of inexpensive food policy and implements price setting support policies, a subsidy to products and insurance for wheat production. Furthermore, it is the exclusive buyer and seller of wheat in the country. Considering endurance of performance and ever-increasing expenses for the supporting plans for wheat producers and consumers, our goal in this paper is to evaluate and study the impact of such policies on the welfare of producers and consumers. To gain such objective, a mathematical model has been developed. The fulfilled policies in the pe...
Journal of Industrial and Systems Engineering, 2018
In an era that in which the economy is in the core of knowledge aspect, knowledge is considered ... more In an era that in which the economy is in the core of knowledge aspect, knowledge is considered as a vital factor in maintaining the sustained competitive advantage of organizations. Today, the art and skill of management in organizations is moving towards changing into the art of "knowledge management"; and, leadership means providing suitable conditions and grounds in producing valuable knowledge via human force thought, and performing this task in a way that would encourage individuals in undertaking personal responsibility. The leadership factor plays a key role in successful implementation of knowledge management in enterprises and organizations; thus, in the present research, the authors have studied the relationship between knowledge management and leadership style as well as defining empowerment leadership style in knowledge management. The statistical population considered in this research consists of employees of Iran Export Credit Insurance Institute. The prese...
This paper studies the opportunities for deploying IT in rural medical centers and uses SWOT matr... more This paper studies the opportunities for deploying IT in rural medical centers and uses SWOT matrix to identify influencing factors on the plan or organization. Strategies are formulated based on internal and external factors of SWOT matrix. Next, strategies are ranked which is not possible by SWOT matrix alone and the matrix solely defines the effect of influencing factors on organization and then strategies. Fuzzy ANP method is used to prioritize strategies so that strategies for deployment of IT in rural medical centers would be prioritized properly. INTRODUCTION Nowadays, we are seeing immigration of villagers to urban areas. This immigration could have several reasons, such as low medical, educational and welfare service rate or shortage or lack of basic products or shortage of job opportunities in villages. %30 of Iran population are villagers thus, this issue requires more attention to be solved. In case of provision of medical, educational, cultural, economic services to vil...
RAIRO - Operations Research
Integrating strategic and tactical decisions to location-allocation and green inventory planning ... more Integrating strategic and tactical decisions to location-allocation and green inventory planning by considering e-commerce features will pave the way for supply chain managers. Therefore, this study provides an effective framework for making decisions related to different levels of the dual-channel supply chain. We provide a bi-objective location-allocation-inventory optimization model to design a dual-channel, multi-level supply chain network. The main objectives of this study are to minimize total cost and environmental impacts while tactical and strategic decisions are integrated. Demand uncertainty is also addressed using stochastic modeling, and inventory procedure is the periodic review . We consider many features in inventory modeling that play a very important role, such as lead time, shortage, inflation, and quality of raw materials, to adapt the model to the real conditions. Since a dual-channel supply chain is becoming more important for sustainable economic development a...
Quality of bread, as one of the most important foodstuff, can be improved by applying advanced in... more Quality of bread, as one of the most important foodstuff, can be improved by applying advanced instruments and technology, composite flour and different kinds of ingredients like emulsifiers and acidic food additives.Implementation of food safety measures and application of quality management systems will reduce microbial and chemical hazards. This study aimed to improve industrial bread production through different approaches regarding customers’ and technical requirements. Fuzzy Quality Function Deployment (FQFD) as a quality management tool deals with improving quality factors, optimizing technological costs and increasing market size considering technical and customer requirements. Fuzzy nalytical Hierarchy Process (FAHP) results in cost decline, efficiency enhancement and effectiveness of economical index in the mentioned systems. Through FQFD and FAHP, requirements of developing industrial bread production such as responsible components of quality, hygiene and safety and also ...
International Journal of Productivity and Quality Management
In many statistical process monitoring (SPM), quality of process or product describes by a relati... more In many statistical process monitoring (SPM), quality of process or product describes by a relationship between one or more predictor variable(s) and a nominal response variable called nominal logistic regression profile (NLRP). In this paper, two control charts including Wald and Rao score test (RST) is developed to monitor NLRP in Phase II. In addition, to evaluate the parameter estimation effect on the performance of control charts, maximum likelihood estimation (MLE) is developed in Phase I. Performance of the proposed control charts are evaluated using some simulation studies and results show that Wald control chart has better performance than RST chart under different shifts in NLRP parameters. Furthermore, to show the efficiency of the proposed approaches in real application, a case study in health-care is applied. Real case results is also showed that Wald control chart has better performance in faster detecting the out-of-control condition.
For each power system, functional reliability must be set in order to meet consumers demand for e... more For each power system, functional reliability must be set in order to meet consumers demand for energy following by reasonable costs. So power system managers must optimize their costs of the system. When the mechanical equipment is put into operation, its performance will degenerate with the increases of operation time and different type of failures may happen which can decrease the percent efficiency of the system. On the other hand in each system, there might be some predetermined basic repairs which can affect the reliability of the system. In this article, a simulation model for failures, maintenance, and repair of a thermal power plant is presented. This model can be applied for determining different scenarios, analyzing maintenance planning and scheduling basic repairs.
European Journal of Economics Finance and Administrative Sciences, 2012
In this paper, the researchers have tried to find a suitable combination of human resources at on... more In this paper, the researchers have tried to find a suitable combination of human resources at one of the banks of the Islamic Republic of Iran with regard to service quality determinants using combined simulation approach and MCDM. In the first step, after reviewing the literature and interviewing the experts, the key determinants of service quality, from the viewpoint of stakeholders, were identified. In the second step, after considering different limitations, various executable scenarios of combination of human resources for improving quality of service were determined through consulting the experts. Then, the value of some of the quality attributes in various scenarios was determined by the experts and some other was predicted using simulation techniques; and finally, based on all the attributes and using TOPSIS technique, possible scenarios were compared and rated.
International Journal of Applied Mathematics and Computer Science, 2011
In this paper we debate on the causes of dissatisfactory of academic studies of marketing models.... more In this paper we debate on the causes of dissatisfactory of academic studies of marketing models. Next, we present a more complete methodology for knowledge discovery in data bases to be used in marketing causal modelling as a decision support tool in marketing management .This methodology is based on genetic fuzzy systems, a specific hybridization of artificial intelligence methods, that is proper for the problems we offer. Marketing intelligence system is called knowledge based marketing management support systems that is an avant-garde evolution in the use of KDD methods based on intelligence systems like this in our paper. The KDD process creates some basic questions for the professionals in this case that are completely discussed and solved next .After the theoretical presentation, this methodology is experimented on a consumer modelling application in interactive computer-mediated environments.
International Journal of Applied Mathematics and Computer Science, 2011
The degree of effectiveness of information technology (IT) in industry and the way it aids organi... more The degree of effectiveness of information technology (IT) in industry and the way it aids organizational goals are considered as very key sensitive points in industry's communications and interactions in the worldwide scale. In fact information technology has got various functions in different sectors of industry most of which are not simply quantifiable. Usually a large quantity of the information we deal with in industrial atmospheres are ambiguous and in a way fuzzy. That's why it makes it almost impossible to utilize common ways of decision-making in this area. In this research due to integrity of decision-making approach, evaluation of information technology will be based on FAHP and BSC approaches. Ways forward for BSC to express organizational hierarchy are divided into four main sections (financial, buyer, the function's internal process, and training & rate of progress). These factors are considered as functional indicators for each section to be evaluated. The FAHP approach here is mainly advised to be used to clarify the ambiguity of the information. In conclusion this integrated methodology facilitates planning in information systems and gives some clues to create a viable system of information technology in industry. That means provision of ways forward for improvements in performance of information technology in Industries.
International Journal of Renewable Energy Research, Dec 25, 2012
Saffron is the most expensive spice and is highly valuable for non-oil export. Drying process is ... more Saffron is the most expensive spice and is highly valuable for non-oil export. Drying process is a critical control point with major effects on chemical and microbiological characteristics, so an appropriate drying method shall meet standard and market requirements as well as cost benefit. Different methods include traditional, freeze, solar, vacuum oven and microwave drying. Solar drying is performed in direct or indirect way. In the 1st way, sunlight is directly exposured with product chamber, while in the later, sun light is stored in solar collectors and then warm air flow is pumped to product chamber. Results by spectroscopy for colour agent (Crocin), odour agent (Saffranal) and flavour agent (Picrocrocin) indicated that solar drying represents high values. Moisture content taken as a key factor of dehydration was detected below permitted standard level. Microbiological profile in solar drying was in compliance with standard and in acceptable level. Optimum drying condition was achieved for 6-6.5 hours in 35-45 o C. Since all microbial safety and chemical quality properties of saffron are preserved in solar drying and also considering energy saving and the resulted cost benefit of this system, it could be introduced as an appropriate drying method in producing rural and collecting sites of saffron.
Various modeling techniques based on possibility distribution function has been applied successfu... more Various modeling techniques based on possibility distribution function has been applied successfully in a wide range of issues related to production planning. However, the possibility distribution function derived from the records recorded in the organization are not always available or changes in production environment may cause a variety of changes and volatilities in model and make it unreliable; changes such as: market demand, changes in types of production costs, capacity, resources, and administrative constraints. In this study fuzzy sets theory has been combined with material requirements planning (MRP). It is noteworthy that material requirements planning (MRP) is one of the most commonly used subdivision of production planning that combining it with fuzzy theory can be applied to develop decision making systems and make them more efficient. In addition, the uncertainties of industrial environments can be exerted properly into the production decision-making.
International Journal of Applied Mathematics and Computer Science
This paper models supply chain uncertainties by fuzzy sets and develops a fuzzy linear programmin... more This paper models supply chain uncertainties by fuzzy sets and develops a fuzzy linear programming model for tactical supply chain planning in a multi-echelon, multi-product, multi-stage with different methods of manufacturing in each stage, multi-distribution centre and multi-period supply chain network. In this approach, the demand, process and supply uncertainties are jointly considered. The aim is to achieve the best use of the available resources and the best method of manufacturing at each stage for a product along the time horizon so that customer demands are met at a minimum cost. The fuzzy model provides the decision maker with alternative decision plans with different degrees of satisfaction.
International Journal of Applied Mathematics and Computer Science
In this article it has been tried to show that fuzzy theory performs better than probability theo... more In this article it has been tried to show that fuzzy theory performs better than probability theory in monitoring the product quality. A method that uses statistical techniques to monitor and control product quality is called statistical process control (SPC), where control charts are test tools frequently used for monitoring the manufacturing process. In this study, statistical quality control and the fuzzy set theory are aimed to combine. As known, fuzzy sets and fuzzy logic are powerful mathematical tools for modeling uncertain systems in industry, nature and humanity; and facilitators for common-sense reasoning in decision making in the absence of complete and precise information. In this basis for a textile firm for monitoring the yarn quality, control charts according to fuzzy theory by considering the quality in terms of grades of conformance as opposed to absolute conformance and nonconformance. And then with the same data for a textile factory, the control chart based on pr...