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The purpose of this research is to verify the relationship between the changes of the operating cycle and the changes of the stock price in the firm. If the reduction of the operating cycle means a positive result of successful business reengineering of an enterprise whereas the increase in the operating cycle has an immense impact on stagnant sales and inefficient inventory management, a negative correlation is expected to exist between the operating cycle and the stock price. Following is a summary of this research ; First, the changes in operating cycle or the ratio of cash cycle and the stock price has a negative correlation. This finding is evident within industries of electronics, transportation equipment and machineries, but not so obvious in other industries. Secondly, the following findings are established for the operating cycle, cash generation capability, and the stock price : • As the capability of cash generation increases, the stock price increases. •As the operation cycle extends, the stock price and the capability of cash generation decreases. Third, a negative correlation is found in the relationship among the raw material, work-in-progress, finished goods and account receivable collection and is maintained between the stock price and each respective factor. And finally, when the operating cycle is extended a negative correlation is found between the stock price and the operating cycle whereas when it is shortened such negative correlation is not found. This indicates only a negative impact on the operating cycle is relevant to the stock price.

The goal of the proposed research in this dissertation is to develop the control chart that considers the advantage of effeciency in control chart and short-coming of difficulty in detecting the small shift, at the same time. This research, therefore, develops new VSI synthetic control chart that considers convenience of use in the field, and perception of change of process applying VSI techniques to synthetic control chart, simultaneously. Proposed control chart, also, can accomplish high quality as well as low cost by designing optimal economic parameter of control chart. The results in this study are summarized as follows ;First, in case of process mean shift δ = 1.0σ, when economic optimal parameter of VSI X-CRL synthetic control chart is at L=5, n=4, the expense amount is the least. The control parameters of CRL/S control chart are determined as k=2.239, k'=0.974, d1=0.100, d2=1.397. Proposed control chart brings cost-cutting effect of 3.04% control expense less than FSI control chart. Second, control cost shows a tendency to increase gradually as increasing λ, parameter of exponential distribution. There is no effect in control limit effect of each control chart by increasing λ, but sampling interval, d1 and d2, goes shortly to reduce time to find special causes. Proposed VSI X-CRL synthetic control chart in this research can use more easily than traditional control chart along with applying run rule and the performance is superior to traditional control chart. It may not be difficult to establish the optimal economic control parameters to apply the practical cost parameters in field.

The purpose of this study is to investigate the productivity wage differentials between regular and irregular workers in Korea. In order to get rid of selectivity bias, this study considers three equations：selection equation and wage equations for regular and irregular workers. Moreover, the wage gap can be divided into productivity wage gap and discrimination by Oaxaca's method.According to the empirical results from this study, the wage gap explained by the productivity differentials is 23.6%; on the other hand, the wage gap explained by discrimination is 76.4%. These results indicate that the wage gap between regular and irregular workers can be mainly explained by discrimination in the labor market. In addition, these empirical results can be varied among the different industries.The empirical results in this study; however, can be obtained under the strong assumption that the decision for the job selection between regular and irregular work can be made by an individuals preference. Otherwise, the empirical results in this study can be varied based upon the different conditions.

This research is aimed to reveal the relationship between psychological empowerment and job involvement. In addition, this research focuses on the mediating role of job satisfaction on the relationship between two variables. For this purpose, 236 employees who joined Hotels completed the questionnaires and SPSS was employed. The findings are as follows：Firstly, psychological empowerment consists of three factors：competence, meaningfulness and self-determination. Secondly, competence and meaningfulness influence on job involvement while self-determination does not. Thirdly, job satisfaction partially mediates psychological empowerment and job involvement. Finally, some implications are included.

On the basis of theoretical linkages between effective followership and organizational productivity, this study examined the influence of individual personality (self-efficacy, self-esteem, self-monitoring, and achievement motivation) and perceived leadership (super leadership and transformational leadership) on effective followership. Data were collected from a sample of 333 white-collar workers (74% response rate) employed in 18 firms in the Seoul metropolitan area. The hypothesized predictors were tested by using the correlation analysis and the hierarchical regression analysis. The correlations with effective followership were self-efficacy = . 51, self-esteem = . 61, self-monitoring = .41, and achievement motivation = .41. The interaction effects of personality characteristics and perceived leadership styles were not found to be significant. Implications in terms of selection, training & development, and organizational productivity were discussed.

This study aims to establish evaluation models for technological competitiveness of technology based firms and to verify them by the statistics of innovative small and medium firms (herein called as "INNO-BIZ"). To analyze evaluation factors of the evaluation model, variables of INNO-BIZ evaluation model were categorized as follows：innovation activities and commercialization, manager, outcomes of innovation.Through the theoretical research, techno-competitiveness may be defined as technical advancement and market expansion. Three patterns of models were considered in pursue of market expansion.Through Correlation Analysis and Factor Analysis, 23 factors among 114 factors of INNO-BIZ evaluation model were found to be effective. Path Analysis, the optimal model was verified. This analysis implies as such：(1) Technical outcomes derived from innovation activity and commercial outcomes are independently integrated for market expansion connected with innovation system.(2) Outcomes of innovation differ by industries and valuation methodolo -giese and so standardized concept for factors are needed for diversified users.

The emerging concept of u-commerce(ubiquitous commerce) is expected to be the next generation of change driver for business activities followed by e-commerce and m-commerce. U-commerce can integrate on-line and off-line businesses and also support various functional activities such as material management, marketing and sales, CRM, logistics, SCM, asset management and human resource management. This paper intends to explore the business applications of u-commerce and to develop emerging business models under ubiquitous environment to improve business competitiveness and productivity. The study examines technological backgrounds of u-commerce including ubiquitous computing and ubiquitous network and identifies the possible problems or obstacles to the implementation of u-commerce.

Digital Factory is a technology facilitating effective development and agile production of products via computer models representing physical and logical schema and the behavior of the real factory systems. For the successful digital factory, we propose a MI-NPS(Meta Intelligent - New Production System) technology. MI-NPS technology is integrated of five technology - the essential technology, the industrial engineering analysis technology, the factory automation technology, the information technology and the education technology. For visualization of digital factory, we use 3D simulation tools and process simulation tools. We could obtain the benefit of savings in cost and time in many factory.

The purposes of this paper are to build theoretical and empirically testable model to identify the determinants of research and development expenditure, and to analyze this model empirically using the Korea Stock Exchange panel data, and to test the impact of IMF crisis on the model relationship. The dependent variables identified in this paper include the equity ratio of large shareholders, institutional investors and individual investors, and the control variables are excess-earning power, internal financing ability, firm size, financial risk, business risk, growth opportunity, and tax support. Empirical panel estimation test reveals that this model can explain about 6.7% of the variance in research and development expenditure to sales ratio. The reasons that this model has low explanatory power are that some variables were measured with errors, and that there were some omitted variables in tested model. The regression results on the model variables are generally in line with predictions. And it appears that the exogenous variable which explains IMF crisis has minor effect on the determinants of research and development expenditure.

As far as international competitiveness index concerns, lots of controversy has been arisen to see if the index is good enough to represent nation's productivity. The index is mainly criticized due to the fact that the index is heavily weighed on soft or qualitative data which comes from the survey. Krugman's proposition in this literature is that the international competitiveness indexes which have been publishing annual basis by the IMD and WEF could not be represented nation's productivity and the indexes are merely a rhetoric. The research is basically designed to test Krugman's hypothesis. The result reveals that the IMD competitiveness is closely related to nation's productivity except internationalization, government, and finance. The IMD index, however, is not enough to explain the increasing rate of nation's productivity. Whereas, the WEF competitiveness index is limited to explain nation's productivity and the increasing rate of nation's productivity as well. To this end, the IMD competitiveness index is superior to the WEF competitiveness index in terms of supporting Krunman's hypothesis.

This paper examines the outsourcing strategy and productivity of global firms. Based on the analysis of eighty-seven cases, the following results were found. First, it was found that outsourcing strategy to mainstream and peripheral activities will be drawn. Second, based on the productivity of outsourcing strategy, productivity to internal and external capability will be drawn. Third, outsourcing strategy to mainstream activities have a positive influences on productivity of internal capability. outsourcing strategy to peripheral activities have a positive influences on productivity of external capability.

Lots of companies should choose the right ERP solution to fit their business environment and enhance productivity. This paper specified the criteria used by companies for investing in ERP systems and for choosing an ERP supplier and explored the features of those factors. A survey was conducted in the Autumn of 2003 by sending the questionnaire to a systematic random sample of 527 companies. A total of 116 usable surveys were received from mailing for a total response rate of 22.01 %. The adaptability and quality of solution is the most important selection criterion for introducing ERP system. At the same time, they considered integration and interface with legacy systems, vendor's image and market leadership as highly important.

Thus far, few literatures have ventured to separate the telecommunications industry by technology as a means of analyzing efficiency and productivity growth. This study decomposes the telecommunications industry into fixed network services and mobile services. It examines the relative efficiency and productivity growth of Korea's fixed network and mobile services in relation to 11 OECD countries from 1996 to 2001. This research uses DEA (Data Envelopment Analysis) and the Malmquist index for analysis of efficiency and productivity growth. The OECD Telecommunications Database 2003 is also used. We adopt as variables one output, revenue and two inputs, access paths and employees. As a result of this study, Korea’s efficiency and productivity growth rate in both services were shown to be relatively low among 11 countries. This study suggests that while fixed network services need to focus strongly on making improvements in pure managerial skills, mobile services need to upgrade their scale efficiency and technical progress.