MODARRES HUMAN SCIENCES
Year:2003 | Volume:7 | Issue:3(Tome 30)|Papers Count:14

Measuring is one of the basic elements of productivity cycle and acts as a control ‎system for other elements in the cycle. In this article, for measuring productivity and ‎evaluating operation of organizations, a comprehensive model has been designed by ‎using Data Envelopment Analysis models (DEA) that is very accurate and true. The ‎Captioned model has been called "Dynamic Productivity Model" due to the fact that ‎time is considered as a decision making unit in this model‏.‏‎‎ In this research monthly tangible inputs and outputs have been used, CCR-BCC, ‎BCC-CCR, CCR and BCC have been tested based on data of a big company and CCR ‎has been considered suitable for executing dynamic model‏.‏‎‎ Evaluating operation by dynamic model is an efficient tool for the managers in order ‎to distinguish the degree of deviation from efficiency in operation in the previous ‎periods, and before facing with new situation, through studying the reason of ‎deviation, they can make necessary planning for improving the efficiency. Also in this ‎research it is possible to compare uncongenial units that are one of the limits of DEA ‎model and also it is possible to evaluate operation of unique organization‏.‏

The aim of this research is identify the factors and criterions of Business Excellence ‎Model for service organization in Iran. First, the literature of research was reviewed ‎and analyzed. In order to process all the information collected, the concept mapping ‎method was used. The result of the concept mapping was 8 distinct clusters, which ‎were in some parts different from other models. In this model more emphasis is on ‎leadership, creative organizational culture, service strategy, management of ‎information and knowledge, flexible organizational structure, service quality, human ‎resources and customer-oriented. These factors and their effecting channels are ‎demonstrated by experts through questionnaire and data analysis with lisrel 8.52 and ‎spss‏.‏

In this paper we investigate the key causal linkages among "CAD/CAM/CAE virtual ‎integration", "degree of manufacturing goal achievement", and "the organizations ‎survival‏". ‏ ‎‎ A decision - oriented conceptual model is proposed and tested on data from 139 ‎automotive manufacturing firms using structural equation modeling technique. Two ‎major research issues are addressed in this study: Do CAD/CAM/CAE virtual ‎integration affect the degree to which firms achieve manufacturing goals in the form ‎of time and cost decrease and the increase of quality and flexibility? To what degree? ‎Does the degree of manufacturing goal achievement lead to a higher degree of ‎survival by improving productivity, profitability, and competitiveness‏?‏ ‎‎ The results support the notion that organizations survival in current competitive ‎atmosphere of world involves internal and external integration of CAD, CAM, CAE ‎activities‏.‏

In this paper, we deal with several time series of daily share prices and daily returns ‎of different companies which are members of the Tehran Stock Exchange. Three ‎forecastability methods as nonlinear mathematical analysis were applied to the data ‎obtained for daily share prices and daily returns in Tehran Stock Exchange during ‎three and half years. The characteristics of the process associated with these time ‎series were analyzed‏. ‏‎‎ Analyzing the behavior of the time series associated with these companies is ‎indicative of their short-term predictability nature. However, using analysis regarding ‎the correlation dimension estimate, indicated that only the time series information are ‎not adequate for prediction and other appropriate variables must also be used. Also, ‎using a Rescaled-range analysis, showed that past information have long term effects ‎on the market and are useful in the process of prediction. Also, the analysis of the ‎Largest Lyapunov Exponent estimate revealed a weakly chaotic behavior and ‎indicated that time series data cannot be used in the prediction process after a certain ‎time‏.‏‎‎ It is shown the time series generator process of these companies are complex ‎nonlinear mappings and the methods based on the various linear modeling strategies ‎are unable to identify these dynamics‏.‏

Responsible ecotourism is a form of tourism which is based on the principles of ‎Sustainable development and can be viable over time. Sustainable ecotourism ‎depends on nature conservation. There should be a symbiotic relationship between ‎ecotourism and environment, in which both derive benefits in a lengthy period of ‎time. Although ecotourism is a relatively young industry, there are many cases of ‎violating the environment. The main cause of these problems is that the principles of ‎financial management are not incorporated into the practice of ecotourism. ‎Developing new managerial strategies, paying attention to the carrying capacity of ‎natural environment, educating people and promoting their ecological understanding, ‎increasing people participation in the ecotourism projects, and allocating some of the ‎ecotourism revenues for the protection of nature, are recommended in this article‏.‏

From early summer in 2002, Iran Minerals Production and Supply Company (IMP ‎ASCO) has required its companies and their subsidiaries to collect information about ‎their present positions as well as the environmental factors of the companies to render ‎‎"strategies" for the development of steel, copper, mines and minerals‏.‏‎‎ To achieve target objectives, Iran Minerals Production and Supply Company ‎‎(IMPASCO) has formed a "strategic committee" to develop strategies in respect to ‎parent organization policy framework based on collected information received from ‎mining companies, including iron ore, coal, phosphate and gold, which are ‎categorized in four company groups‏. ‏‎‎ I, as industrial strategist, have developed and compiled (IMPASCO) strategic ‎formulation plan, impressed by strategic model and SWOT (strengths, weaknesses, ‎opportunities and threats) analysis leading to the formulation of four macro-strategies ‎along with a number of ancillaries‏.‏

In the Khuzestan sugar cane farms, irrigation is one of the most important problems of ‎agriculture. In this respect the design and construction of water transfer network have ‎and important role considering the technical and economical factors. The goal of this ‎paper is, choosing the optimal method of water transfer to the sugar cane and ‎byproducts farms of Khuzestan. The various methods are: Metallic pipe, GRP, ‎Polyetillene, and second degree concrete channel. For selecting the best method, the ‎multicriteria decision making models have been used and for determining criteria of ‎weights, entropy and pairwise, comparative methods have been used‏.‏

As the industrial environment becomes more competitive, supply chain management ‎becomes a topic of interest to many authors. The focuse in this paper is on developing ‎a mathematical model for supply chain planning. The model established in this paper ‎analyzes the supply chain decisions at three levels: strategic, tactical and operational. ‎At the strategic level, the importance of suppliers and distribution centers is calculated ‎by AHP technique. At the tactical level, a multiobjective model is presented to ‎aggregate supply chain planning. And at the operational level, monthly procurement, ‎production and distribution activities are optimized under the minimum cost ‎objective. In this level, we can obtain economic quantity of purchasing, producing, ‎and distributing. The supply chain of Yazd Rubber Industries Complex is studied ‎within the proposed model. Results indicate that significant improvement is obtained ‎by applying this model‏.‏