Choon Seong Leem

A classification of mobile business models and its applications

Although there have been a lot of studies on mobile business, it is hard to find ones in which an integrated perspective of mobile business based on both customers’ and companies’ needs is suggested. This research develops a mobile business model classification scheme and applies it to analysis of current status in mobile business. In the first case study on 65 firms in Korea, mobile solutions are categorized based on the classification scheme in order to analyze an overall market environment of mobile business. In the second case study on mobile service trend analysis, a set of evaluation indices including four general indices, ten effectiveness indices and 13 measurement indices were developed to analyze mobile service environment in the perspective of B2C (business to customer). For the second case study, 200 mobile heavy users were questioned on the mobile service‐related issues.

A reference system for internet based inter-enterprise electronic commerce

As supply chain management and its global outsourcing are widely spread recently, many researches and development focus on integration of inter-enterprise information systems. The most important factors to achieve inter-enterprise integration are standardization and digitalization. The objectives of this work are to develop the reference model for internet based inter-enterprise electronic commerce and to implement a prototype system for its fundamental issues such as business process, information standards, and information system integration. The electronics assembly processes are chosen as the target industry. For the reference architecture of inter-enterprise electronic commerce, we also investigate intra-enterprise business processes and model them with IDEF0. The standard documents and its items are defined from analysis of traditional documents for outsourcing processes and EDI documents. For standard exchange method, web-based XML is adopted, and corresponding DTD and XSL for RFQ and Quotation are developed. In order to prove feasibility and effectiveness of the reference system a prototype system is introduced and implemented.

An integrated evaluation system based on the continuous improvement model of IS performance

In order to achieve competitive business goals, every enterprise needs to evaluate the current level of information systems performance and their utilization. The evaluation measures the technical capacity and operational capability of enterprise information systems and diagnoses their effectiveness in business goals and efficiency in resources. An integrated evaluation system is developed based on the continuous improvement model of information systems performance. The system has been applied to performance measurement of information systems with a huge set of data from Korean industries, and proven reliable and practical

Introduction to an integrated methodology for development and implementation of enterprise information systems

An integrated methodology for successful development and implementation of enterprise information systems is developed. This paper describes the methodology and defines five components and one repository which can be customized with business scenarios and patterns according to various business environments. Five components consist of information strategy planning, economic justification and measurement, enterprise information system appraisal, package software evaluation, and unified modeling tools. They characterize the methodology through its entire road map. Also, case studies are provided to prove its practical values.

Development of certification and audit processes of application service provider for IT outsourcing

Abstract ASP (Application Service Provider) refers to an exclusive outsourcing service in which the service provider is given access to the data located in an external data center. Therefore, the security of data and the reliability of the service provider are matters of great importance even when comparing with other information systems. Essential to securing the reliability and efficiency of the ASP service are certification and audit processes. In this paper, we discuss certification and audit processes of ASP services. Our research included: first, a survey of 35 Korean companies’ awareness, advantages and concerns on ASP services. This formed the base of our research. Second, the ASP certification framework and processes required to verify the reliability of ASP services were summarized and case applications were also outlined. Finally, we proposed an audit process aimed at improving efficiency of ASP services. By reference to traditional definitions of information systems and the audit process, new definitions and frameworks for the ASP audit are suggested. The new information system audit processes were compared with traditional ones, and the detailed control items were verified through calculation of their relative importance with respect to ASP life-cycle activities.

A business model (BM) development methodology in ubiquitous computing environments

Even though the importance of a Business Model (BM) in ubiquitous computing environments has been growing, current research mainly focuses only on technology. Without a proper evaluation method for a BM, a promising BM has not been verified. In this research, we suggested a BM development methodology for ubiquitous computing, which contains the Business Model Analysis (BMA) framework for analyzing a BM and the Business Model Feasibility Analysis (BMFA) framework for evaluating a BM. The methodology is composed of phases, activities, and tasks in detail and depth, having systematic relations to each other. A prospective BM of ubiquitous computing environments could be extracted by this methodology.

Security of the internet‐based instant messenger: Risks and safeguards

Purpose – To identify controls that can harness the power and capabilities of instant messengers (IM) while minimizing potential security risks.Design/methodology/approach – A risk analysis method and (CIS)2 model are used.Findings – IM is a great tool for enterprise productivity. However, it has so many risks, but one could identify and control these risks with technical and managerial countermeasures.Research limitations/implications – This paper fails to provide detailed and specific risks of commercial IMs, and the case study provided in this paper focuses on the technical rather than managerial issues.Practical implications – A very helpful case study which provides general risks and controls of recent IMs for the security officers of various organizations.Originality/value – This paper outlined the risks of IM and potential controls for securing public IM in the workplace.

A maturity model and an evaluation system of software customer satisfaction: the case of software companies in Korea

The importance of software has been growing rapidly owing to the development of various Internet and e‐business applications. One of the active research areas in software involves its evaluation methods or models. The traditional approaches to software evaluation are based on the development process point of view, and their major concerns are not strongly related to user or customer‐oriented evaluation of software. In this paper, a maturity model and a corresponding evaluation system are suggested that focuses on software customer satisfaction. As a case study, they are applied to 18 software companies and their 180 customers in Korea to prove their practical values.

A taxonomy of ubiquitous computing applications

Ubiquitous computing is emerging as a new paradigm in next-generation information technology. This new paradigm has been embodied into tremendous business models and applications through lots of ubiquity-related technologies. In this study, a new taxonomy for these business applications and technologies is suggested. In order to prove the practical values, two case applications of the taxonomy are conducted. In the cases, 24 ubiquitous computing services and 19 ubiquitous computing projects are classified so that the status quo of ubiquitous computing is analyzed.

Information technology maturity stages and enterprise benchmarking: An empirical study

Purpose – Recently, many enterprises are using a variety of methods and techniques to examine and improve their current maturity level of information technology (IT). Although IT evaluation studies based on IT maturity stages have been conducted widely, the stages theory has not been confirmed through statistical testing. IT evaluation activities can present managerial implications to an enterprise by determining where it stands within the stages theory. The purpose of this paper is to test empirically and repeatedly the once‐defined maturity model in order to make its validity more powerful.Design/methodology/approach – To define IT maturity stages and benchmarks with statistical testing, evaluation fields and factors of the L&K Model are referred to. Data were gathered by a questionnaire survey and interviews, in which 312 enterprises in South Korea participated. Consequently, IT maturity stages are defined and significant benchmarks of each stage are validated through ANOVA and post hoc comparison meth...