• Journal of the Korean Operations Research and Management Science Society
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• v.18 no.2
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• pp.183-203
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• 1993

One of the most difficult and time-consuming stages in the development of the knowledge-based system is a knowledge acquisition. A splitting algorithm is developed to infer a rule-tree which can be converted to a rule-typed knowledge. A market segmentation may be performed in order to establish market strategy suitable to each market segment. As the sales data of a product market is probabilistic and noisy, it becomes necessary to prune the rule-tree-at an acceptable level while generating a rule-tree. A splitting algorithm is developed using the pruning measure based on a total amount of information gain and the measure of existing algorithms. A user can easily adjust the size of the resulting rule-tree according to his(her) preferences and problem domains. The algorithm is applied to a market segmentation problem of a medium-large computer market. The algorithm is illustrated step by step with a sales data of a computer market and is analyzed.

• New & Renewable Energy
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• v.10 no.1
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• pp.41-49
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• 2014

For a proper valuation of wind power project, it is necessary to consider volatilities of key parameters such as annual energy production, electricity sales price, and long term interest rate. Real option methodology allows to calculate option values of these parameters. Volatilities to be considered in wind project valuation are 1) annual energy production (AEP) estimation due to meteorological variation and estimation errors in wind speed distribution, 2) changes in system marginal price (SMP), and 3) interest rate fluctuation of project financing which provides refinancing option to be exercised during a loan tenor for commercial scale projects. Real option valuation turns out to be more than half of the sales value based on a case study for a FIT scheme wind project that was sold to a financial investor.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.352-353
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• 2017

20세기부터 사용된 자동차는 현대에 이르러 생활의 필수품이 되고 있다. 전기자동차, 수소자동차 등의 미래지향적인 발전을 거듭하고 있는 가운데 자동차는 유형과 제조사 그리고 세부 모델까지 매우 다양화되고 있다. 4차 산업혁명과 함께 제조업 기반의 스마트팩토리가 주목받고 있는 가운데, 본 논문에서는 자동차 분야를 중심으로 제조 분야가 아닌 판매와 마케팅에 활용할 수 있는 융합관리 시스템을 제안한다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.38 no.1
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• pp.124-130
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• 2015

In many inventory situations, items for sales are generally stocked in a multiple of variations called stockkeeping units, such as size, color, style, and so on. For better management performance on sales items, proper and effective management is necessary for the stockkeeping units. In dealing with many items and those stockkeeping units, individual inventory analysis for each stockkeeping unit needs large amount of time or cost. Also the individual approach in inventory planning increases the demand variation of an item as the result by combining of demand variations of all stockkeeping units, accordingly the inventory turnover ratio and profitability are dropped down. This research suggests an effective method of systematic control of total stockkeeping units by generating from the total item basis, and shows how to reduce the safety stock and the average inventory with attaining a planned customer fill rate of the item and each stockkeeping units.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.111-112
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• 2014

본 논문에서는 음식점을 방문한 고객이 앉은 자리에서 직원을 부르지 않고 바로 주문/호출 메시지를 POS(Point Of Sales)기에 보낼 수 있는 인플레이스 주문 시스템에 대해 기술한다. 이는 고객이 가지고 있는 스마트모바일 기기의 앱과 테이블에 부착된 NFC(Near Field Communication) 인식을 통해 테이블정보와 주문/호출정보를 보낼 수 있다. 이 시스템을 통해 직원의 활동 동선을 줄여줄 수 있으며, 이로인해 고객에게 더 빠른 대응을 해 줄 수 있게 될 것이다.

• Journal of information and communication convergence engineering
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• v.17 no.4
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• pp.267-273
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• 2019

South Korea has allowed parallel importation since 1995. Parallel importation causes competition among importers in the logistics process allowing, consumers to purchase foreign brand products at low prices. Most parallel importers base product pricing on subjective judgements. Fashion products in particular, have different sales rates depending on trends and seasons, so sales performance varies greatly depending on selling price timing and policy. The merchandiser (MD) set the price on parallel importation products by aggregating information on imported products and pricing goods. However, this customized process is very time consuming for the MD. This is because the logistics process of parallel importation's customs clearance procedures and repair works is complicated and takes a significant amount of time. In this paper, we propose an improved parallel importation logistics process based on big data, which automatically sets the price of parallel importation products.

• Journal of information and communication convergence engineering
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• v.2 no.2
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• pp.116-118
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• 2004

In the power industry after restructuring of Power industry will be appeared on-site type business, power retail sales business, and power wholesales business, power dealing business, customer inclination business ＆ delivery of power facilities. Among them, power trade business, customer inclination business and on-site type business will be rapidly increased and occupied attention. In addition, it is forecasted to advent the broker, provider, market place, power marketer, system operator and generator as a main player. Meanwhile, it needs protection of existing power industry and activation of new energy market for accomplishment of restructuring of power industry.

• Journal of Information Technology Services
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• v.1 no.1
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• pp.7-15
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• 2002

The role of SI in this IT era is recognized high as a value-creating activity in the overall industries. But the valuation factors are not so attractive compared to other industries. Among the negative factors are the relatively high cost of sales and operating cost, the lack of technical differentiation among the firms, the low level of entry barrier, and the resulting competition in the SI industry. But some positive factors such as the expectation for the overall introduction of IT into eoconomy, development of SM (System Management) projects, and the sales of developed soultions and components increase the value of SI firms.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.331-332
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• 2018

최근 디지털 금융 기술의 발전에 따라 모바일 간편 결제가 보편화 되고 있다. 이러한 시대에 발맞추어 외식업체, 또는 대형 식품 프랜차이즈 기업들은 자체 모바일 결제 시스템을 도입하는 추세이다. 하지만 소규모 자영업자들은 기존 시스템과의 호환 및 비용 문제 등으로 새로운 시스템을 도입하기가 어려운 실정이다. 스마트 POS(Point of sales)를 표방하여 소규모 사업자를 대상으로 시장에 나온 몇 가지 제품이 있지만, 이 제품들은 별도의 애플리케이션을 매장과 고객의 모바일 기기에 설치해야 하므로 접근성이 떨어지는 단점이 있다. 이에 본 논문에서는 별도의 설치를 하지 않아도 이용이 가능한 Web 기반의 POS 시스템을 제안한다. 이 시스템으로 매장은 효율적인 매출 및 관리뿐만 아니라 고객과의 Interaction 또한 증가시킬 수 있다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.36 no.1
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• pp.96-102
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• 2013

This paper makes a detailed comparison between two metrics designed for measuring customer's satisfaction in the retail industry. The first metric, which is called the customer service level, has not been widely used due to the intrinsic requirement on the parameter assumption(s) of the demand distribution. Unlike the customer service level metric the in stock ratio metric does not require any requirements on the demand distribution. And the in stock ratio metric is also very easy to understand the meaning. To develop the detailed planning activities for business with the in stock ratio metric on hand one should collect some information as following : 1) POS (Point of sales) data, 2) Inventory Data 3) Inventory Trend.