• Archives of design research
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• v.11 no.2
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• pp.191-200
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• 1998

In the "digitalized" world of new media, visual designer are increasingly enlarging their roles in desighing interaction products. However, the concepts and their methods of the interaction design have not been well established in the design community yet. The reason is attributed to the fact that designing interaction products requires two way communication between the products and final users. whereas traditional graphic design counts only on one way communication. This study emphasizes GUI design should aim at improving the usability of products which helps users quickly learn about the products and easily use them. The usability of GUI design significantly improved by securing logical rationality helps designers communicate and collaborate with program engineers and other product developers. To explain how designers can effectively communicate with program engineers and other product participants in the design process, a model of design collaboration is provided in this study. Based on the model, the study deals with the principles and methods of visual interaction, the formulation of specification system, testing design usability, and design evaluation. The study concludes that GUI designers must ensure logical rationality and the cognitive approach of visual language. Because it improves the usability of products. It also becomes an objective tool for communicating and collaborationg with engineers and the other participants in the design process.

• Journal of Industrial Convergence
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• v.1 no.1
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• pp.115-126
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• 2003

In order to examine the determinants of new product success, winning products are analyzed with a focus on merchantability. The specific dimensions of product advantage have not been studied as yet. As results of the analysis, the determinants are classified into function, aesthetics, economy, safety, usability, reliability, brand image, assurance, distribution channel, advertisement, DEF(design for the environment). This study augmented the data set through questionnaire survey to marketing professor in University. The results of this study would be a cue to the future direction of new product development and to management of exist product.

• Journal of Korean Society for Quality Management
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• v.42 no.2
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• pp.253-264
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• 2014

Purpose: The aim of this study is to gain a competitive advantage in the global marketplace by examining the current situation of three domestic Food Dehydrator companies' products. Food Dehydrators are sort of small domestic appliances(SDA), first introduced by Korean companies. Furthermore, this study suggests the improvement plans in the rapidly changing world situation. Methods: Evaluate through comparing three domestic Food Dehydrator companies' products based on the PQI(Premium Quality Index) model, developed by product quality evaluation experts group. Results: At first, we classified evaluation factors into three parts - usability quality, emotional quality - and each of the factors includes sub factors. Under this condition, the results of this study are as follows; the brand quality is remaining at a high satisfaction level compare to other two factors but emotional quality is assessed to be low. This study has shown at customers consider brand and usability quality factors as the most important factor due to the nature of the product. Conclusion: As the possibility of increasing customer needs such as product design and sensitive quality besides usability quality has risen in a competitive global market, the manufacturing companies in Korea are recommended to put forth the necessary effort to improve their product quality, especially in terms of emotional quality.

• Archives of design research
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• v.13 no.2
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• pp.103-109
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• 2000

Rapid prototyping technology has been widely applied to the design process in the industry. This technology made it easy to generate a prototype which acts like a real product in logic. However, this technology has not been validated sufficiently as a usability test method. The purpose of this study was to test the hypothesis : There was no significant difference between a real product and its prototype. An experiment was designed to test it statistically. a microwave oven was selected and its prototype was generated using a rapid prototyping tool. Six subjects used the microwave oven and another six subjects used the prototype to perform five scenario tasks. As a result, there was significant difference between the real product and prototype in success rate, task completion time, and number of buttons pressed. The prototype was more difficult to operate than the real product. Therefore we should be careful when we apply rapid prototyping. technology. In the discussions, the causes of the difference were identified and some guidelines were suggested for who wants to apply rapid prototyping tool to the usability test.

• Journal of Korean Institute of Industrial Engineers
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• v.28 no.3
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• pp.331-343
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• 2002

This paper proposes a fuzzy rule-based model as a means to build usability models between emotional satisfaction and design variables of consumer products. Based on a subtractive clustering algorithm, this model obtains partially overlapping rules from existing data and builds multiple local models each of which has a form of a linear regression equation. The best subset procedure and cross validation technique are used to select appropriate input variables. The proposed technique was applied to the modeling of luxuriousness, balance, and attractiveness of office chairs. For comparison, regression models were built on the same data in two different ways; one using only potentially important variables selected by the design experts, and the other using all the design variables available. The results showed that the fuzzy rule-based model had a great benefit in terms of the number of variables included in the model. They also turned out to be adequate for predicting the usability of a new product. Better yet, the information on the product classes and their satisfaction levels can be obtained by interpreting the rules. The models, when combined with the information from the regression models, are expected to help the designers gain valuable insights in designing a new product.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.179-184
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• 2006

"사용자 중심의 디자인(User-Centered Design)" 은 좋은 사용성을 가진 제품을 만들기 위한 사용되는 보편적인 접근방법중의 하나이다. 그러나 투자대비 최대의 가치 창조라는 경제성 원리와 개발 기간의 제약을 고려하면 개발 중 사용성 평가를 통해 발견된 문제들을 모두 제품에 반영하는 것은 거의 불가능 하다고 볼 수 있다. 그러므로 발견된 문제들에 대한 우선 순위를 정의한 후 가장 중요한 문제점에 대해 먼저 개선하는 전략이 필요하다. 기존의 사용성 문제에 대한 우선 순위는 주로 문제 자체의 심각도를 고려하여 결정되었다. 그러나 사용자가 인식하는 사용성(Perceived Usability)를 높이기 위해서는 사용자가 중요하게 생각하는 효용을 우선적으로 제품에 반영하는 것이 필수적이다. 본 연구에서는 카노의 사용자 만족 모델을 활용한 사용자 효용과 사용성 문제들의 잠재가치를 고려한 사용성 문제 분류를 기구 사용성 평가 가이드라인의 제작에 적용하였다. 제안된 분류에 의해 디자인 가이드라인을 1) 반드시 만족 시켜야하는 제품 사용성 기준, 2) 경쟁사 대비 우위를 유지하기 위한 비교평가 기준으로 나누어 정의함으로써 단일 제품의 절대적 평가가 아닌 경쟁사 제품과의 비교 평가를 통한 개선 방향의 제시에 Kano 모델을 기반으로 정의된 사용성 문제들의 효용가치분류가 효과적이라는 것을 본 연구를 통해 보이고자 한다.

• Journal of the Ergonomics Society of Korea
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• v.19 no.1
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• pp.37-48
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• 2000

Universal design is an approach to create environments and products that recognizes the diversity of users, regardless of their ability or age. Recently, old person and disabled person rapidly go on increasing in number. So, universal design concept becomes more and more important in product and environment, etc. In this study, we dealt with the universal design problem of microwave oven considering old persons. New design model for microwave oven was developed and evaluated using human factors approach. The principles of universal design was developed through literature survey and questionnaire survey for old persons, and then design alternatives were developed according to these principles. Two experiments were performed in this study. The purpose of the first experiment was to select final design alternative and the experiment was performed using rapid prototypes. The second one was a usability testing for the real model of final alternative. In this experiment, the real model was compared with the existing real product. As the result, the new design model was a little more excellent than the existing model in usability.

• Korean Journal of Computational Design and Engineering
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• v.7 no.3
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• pp.177-189
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• 2002

For the development of automobile lighting components, various designers, developers and manufacturing personnel are involved, each group needing different software tools. In this Smartlite project, several software tools were developed far product development of the lighting components and then tested using two different user interfaces (UIs); the first was based on a commercial CAD system (SDRCI-DEAS) and the second was based on a web browser. The specific focus of this study was a comparison between the new web-based UIs, and the UIs on commercial CAD systems. The usability data have been collected from the users at Visteon and showed that the web-based UIs provided comparable functionality with the CAD-based UIs in terms of performance and usefulness. For the criteria of accessibility, the web-based tools out-performed the CAD-based tools.

• Proceedings of the ESK Conference
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• 1997.04a
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• pp.281-285
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• 1997

We developed the system which could trace the hand and arm motion to test the product usability by integrating a wired-glove and a magnetic position sensing system. The magnetic position sensing system traces the position and orientation of the arm while the sired-glove measures 18 phal angeal joint angles. A case study was performed on two different camcorders in weight. The heavier camcorder was more stable than the lighter one. Also the recording task is more stable than the zoom-in and zoom-out tasks. This system could be used to monitor and quantify the hand and arm motion in real time and also could be used to test the product usability where the hand motion is important.

• Journal of Korean Society for Quality Management
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• v.27 no.2
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• pp.20-46
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• 1999

Many researches have concluded that product advantage or superiority is the most important factor for the commercial success of new products. However, the specific dimensions of product advantage have not been studied as yet. Based on a survey of newly introduced products in recent years, we suggest the eight dimensions of quality of new product: function, time, limitation, usability, problem prevention, economy, maintainability, nativeness. The dimensions and their constituents are explained with examples.