• Proceedings of the Korea Information Processing Society Conference
• /
• 2004.05a
• /
• pp.439-442
• /
• 2004

최근에 인터넷 경매가 보편화되면서 경매 물품의 가격 결정을 관한 연구가 증가하고 있다. 그러나 이것들은 경매 물품 대한 최근의 추세와 시간에 따른 주기변화를 반영하지 못하여 잘못된 낙찰 예정가를 생성하는 경우가 많다. 본 논문에서는 이러한 문제점들을 해결하고자 수요 예측에서 사용하는 시계열 분석을 이용하여 경매기록 데이터베이스로부터 경매 물품에 맞는 낙찰 예정가를 자동으로 생성하는 방법을 제안한다. 또한 성능 분석을 통하여 시계열 분석 방법에 의한 낙찰 예정가 생성방법의 특징을 비교하고 분석한다. 여기서 제안된 방법이 경매 물품의 실제 낙찰가와 차이를 줄여 낙찰률을 높이고, 경매 물품이 지나치게 낮은 가격으로 낙찰 되는 경우를 줄일 수 있음을 연구한다.

• Journal of the Korea Society of Computer and Information
• /
• v.28 no.12
• /
• pp.239-248
• /
• 2023

The purpose of this study is to analyze the factors for service contracts that affect the successful bid price rate, focusing on the case of the country market. In the study, ordering organizations and bidders differentiated themselves from existing studies by analyzing service contracts that affect the successful bid price rate in a wide range of country markets. Comparative analysis of the awarding price ratio for services, this work provides a comparable result to the existing results in the previous literature. The analytical model used five independent variables such as budget, contract method, the days of the public notice, the awarding method, and the lowest awarding ratio. In the survey and analysis, big data was collected using text mining for service bids for Nara Market over the past 18 years and data was analyzed in a multi-dimensional way. The results of the analysis are as follows, (1) if budget does not determine the awarding price ratio. This is not the case in small amounts. (2) The contract method affects the awarding price ratio. (3) The days of the public notice increase, the awarding price ratio decrease. (4) the awarding method affects the awarding price ratio. (5) The lowest awarding ratio determines the awarding price ratio. Based on the results of empirical analysis, policy implications were sought.

• The Journal of Society for e-Business Studies
• /
• v.9 no.2
• /
• pp.17-31
• /
• 2004

It is very important that sellers provide reasonable reserve prices for auction items in internet auction systems. Recently, an agent has been proposed to generate reserve prices automatically based on the case similarity of information retrieval theory. However, one of its drawbacks is that the recent trend of auction prices is not reflected in the generated reserve prices, because it suggests the bid price of the most similar item from the past auction data. In this paper, in order to overcome the problem, we propose a new method that generates reserve prices based on the moving average of time series analysis, in which more weight is provided to the recent bid prices. Through performance experiments, we show that the successful bid rate can be increased by preventing sellers from making unreasonable reserve prices.

• Journal of the Korea Society of Computer and Information
• /
• v.11 no.5 s.43
• /
• pp.59-67
• /
• 2006

This paper proposes a forecasting method for court auction information system using exponential smoothing. The system forecast a highest bid price for claim analysis, and it is designed to offer an quota information by the bid price. For this realization, we implemented input interface of object data and web interface of information support. Input interface can be input, update and delete function and web interface is support some information of court auction object. We propose a forecasting method using exponential smoothing of a highest bid price for auto-claim analysis with real time information support and the results are verified the feasibility of the proposed method by experiment.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2003.11c
• /
• pp.1699-1702
• /
• 2003

최근에 인터넷을 통한 전자경매가 보편화되면서 경매 물품의 가격 결정에 대한 관심이 증가하고 있다. 또한, 경매물품의 낙찰가를 판매자가 결정하거나 정보 검색이론의 사례 유사도에 기초하여 생성하는 에이전트가 연구되고 있다. 그러나, 이것은 경매 물품에 대한 최근의 변화 요인을 반영하지 못하고, 상품 추천에서 사용하는 사례 유사도를 가격 결정에 적용하여 잘못된 가격이 생성되는 경우가 많다. 본 논문에서는 이러한 문제점을 해결하고자 시계열 예측에서 사용하는 지수평활법을 이용하여 최근의 경매자료로부터 경매 등륵 물품의 낙찰 예정가를 자동으로 생성하는 시스템을 제안한다. 성능 실험 결과, 본 시스템을 사용할 경우에 경매 물품의 실제 낙찰가와 차이를 줄여 낙찰률을 높이고, 경매 물품의 객관적인 가격형성이 가능함을 보인다. 또한 기존의 사례 유사도를 이용한 낙찰 예정가 생성 방식과의 성능 비교를 통하여 새로운 방법의 효율성을 나타낸다.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.31 no.5D
• /
• pp.719-726
• /
• 2011

The government intensifies screening criteria for the guarantee of reasonable bidding price and the prevention of low bidding price, however, the low tender rate still becomes an issue. This study analyzed the problems of screening criteria for the guarantee of reasonable bidding price, and then derived some major issues such as the restriction of decisive factors for initial construction cost, the rate of activities over five percent of surveyed price and the restrictive review criteria of inadequate activities. To solve thess problems, this study suggests an improved process model for estimating optimal bidding rate that can select a contractor with the guarantee of reasonable bidding price.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2007.11a
• /
• pp.704-709
• /
• 2007

The purpose of this study is to present both problems and improvement plans on the bidding system of the Korea National Housing Corporation, which orders apartment houses professionally. For data gathering, this study used data from electronic procurement system from 2001 to 2005. The research method of this study is to analyze the data categorized into four types: changes of ordering and contract price ration, the lowest-pricing bidding system, and permanent projects by grades. As a result of the analysis, the amount of ordering is biased in favor of particular level. Finally, this study present following improvement plans: 1) screening system and the lowest-pricing bidding system need to be supplemented, 2) the contract price ratio and the amount of ordering should be controlled, and 3) the improvement of PQ and the introduction of the list of Qualified companies by types need to be presented.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.15 no.1
• /
• pp.147-152
• /
• 2020

The bidding program uses statistical analysis method of the collected bidding information and the accumulated bidding results from the public/private sector; however, it is not easy to predict the accurate bidding price by winning the bid method through multiple lottery. Therefore, this paper analyzes the accuracy of the current state data of the electric construction bid from January 2015 to August 2019 acquired from the electric net, which is an electronic bidding site, We use MLP and RNN method, and proposes a technique to predict the bidding amount necessary for the winning bid by predicting the amount between the first and the lowest bidder.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.16 no.2
• /
• pp.172-178
• /
• 2006

This paper presents a development of court auction information system using time series forecasting. The system forecast a highest bid price for claim analysis, and it is designed to offer an quota information by the bid price. For this realization, we implemented input interface of object data and web interface of information support. Input interface can be input, update and delete function and web interface is support some information of court auction object. We propose a forecasting method of a highest bid price for auto-claim analysis with real time information support and the results are verified the feasibility of the proposed method by experiment.

• The Journal of Bigdata
• /
• v.3 no.2
• /
• pp.87-99
• /
• 2018

This study analyze the factors affecting the number of bidders in public contracts by collecting contract data such as purchase of goods, service and facility construction through KONEPS among various forms of public contracts. The reason why the number of bidders is important in public contracts is that it can be a minimum criterion for judging whether to enter into a rational contract through fair competition and is closely related to the budget reduction of the ordering organization or the profitability of the bidders. The purpose of this study is to analyze the factors that determine the participation of bidders in public contracts and to present the problems and policy implications of bidders' participation in public contracts. This research distinguishes the existing sampling based research by analyzing and analyzing many contracts such as purchasing, service and facility construction of 4.35 million items in which 50,000 public institutions have been placed as national markets and 300,000 individual companies and corporations participated. As a research model, the number of announcement days, budget amount, contract method and winning bid is used as independent variables and the number of bidders is used as a dependent variable. Big data and multidimensional analysis techniques are used for survey analysis. The conclusions are as follows: First, the larger the budget amount of public works projects, the smaller the number of participants. Second, in the contract method, restricted competition has more participants than general competition. Third, the duration of bidding notice did not significantly affect the number of bidders. Fourth, in the winning bid method, the qualification examination bidding system has more bidders than the lowest bidding system.