• 대한안전경영과학회지
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• 제15권3호
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• pp.133-141
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• 2013

As a work analysis technique, Work Domain Analysis (WDA) aims to identify the design knowledge structure of a work domain that human operators interact with through human-system interfaces. Abstraction hierarchy (AH) is a multi-level, hierarchical knowledge representation framework for modeling the functional structure of any kinds of systems. Thus, WDA based on AH aims to identify the functional knowledge structure of a work domain. AH has been used in a range of work domains and problems to model their functional knowledge structure and has proven its generality and usefulness. However, many of researchers and system designers have reported that it is never easy to understand the concepts underlying AH and use it effectively for WDA. This would be because WDA is a form of work analysis that is different from other types of work analysis techniques such as task analysis and AH has several unique characteristics that are differentiated from other types of function analysis techniques used in systems engineering. With this issue in mind, this paper introduces the concepts of WDA based on AH and offers a comprehensive list of references. Next, this paper proposes a set of principles for effectively applying AH for work domain analysis, which are developed based on the author's experiences, consultation with experts, and literature reviews.

• 한국철도학회논문집
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• 제13권3호
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• pp.264-270
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• 2010

본 연구에서는 역사 내 철도 안전 감시 시스템의 최적 디스플레이 설계를 위하여 생태학적 인터페이스 디자인(EID, Ecological Interface Design) 프레임웍을 적용하였다. 특히, EID 개발을 위한 가장 선행적 연구인 작업 영역 분석(WDA, Work Domain Analysis)을 실시하였다. 먼저 WDA를 위한 시스템 경계를 도시철도의 역사 내 안전 감시 시스템으로 설정하고, Abstraction Hierarchy (AH)를 이용하여 역무원의 작업 환경을 분석하였다. AH 결과 역무원이 작업 환경에서 얻게 되는 정보의 흐름을 다섯 단계의 수준(Functional Purpose, Values and Priority Measures, Purpose-related Functions, Object-related Process, Physical Object)으로 전개할 수 있었고, 각각의 수준의 정보로 이루어진 작업 영역 모델(WDM, Work Domain Model)을 얻었다. 이 WDM이 도시철도 안전 감시 시스템의 작업 환경을 얼마나 반영하는지 평가하기 위하여 10년 이상의 역무실 직무 경험이 있는 전문가를 대상으로 Scenario Mapping법을 실시하였다. 평가된 WDM을 바탕으로 현재 역사 내 안전 감시 시스템이 제공하고 있는 정보는 물론이고, 현재 안전 감시 시스템이 제공해주고 있지 못하는 13개의 요구 정보를 추가로 추출하였다. 이렇게 추출된 요구 정보는 도시철도 안전 감시 시스템의 EID에 반드시 반영되어야 할 필수적인 정보로 활용될 수 있다.

• 대한인간공학회지
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• 제25권4호
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• pp.103-113
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• 2006

The purpose of this study was to evaluate an effect of the new air traffic control display designed by Ecological Interface Design [EID]. The methodology of EID has not been applied to the development of the air traffic control display so far. To design a new air traffic control display by EID, We implemented Work Domain Analysis about the air traffic control domain and made the Work Domain Model that consisted of the five levels of the Abstraction Hierarchy. We extracted the Information Requirement from the completed Work Domain Model and the extracted information requirements from the model were used to design the new air traffic control display. We evaluated an effect of the new air traffic control display designed by EID. Participants for evaluating consisted of 14 active military air traffic controller of the Republic of Korea Air Force. Experiment was designed two factors within subject. Factors manipulated in the experiment included displays type to compare the existing type with the new ecological interface type and included complexity to compare the effect of the high complex situation with the effect of the low complex situation. Response time about questions with relation to air traffic collision situation, accuracy, and subjective work load were measured. The results reveled that EID type's display has a significant effect on response time, accuracy, and subjective work load and verified that EID could be applied to the air traffic control domain that is more complex and dynamic.

• 대한인간공학회지
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• 제31권2호
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• pp.353-362
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• 2012

Objective: The aim of this study is developing the navigation radar display of navy ship with ecological interface design (EID) framework. Background: Navy ship radar operator must perform navigation support tasks by monitoring the complex and diverse information presented on the radar display. Current radar display is limited in effective navigation aid and response to an unusual state immediately. It is necessary to develop an effective radar display. Method: Ten navy radar operators performed a series of trials in a low-fidelity radar simulation in which they attempted to solve the problems of current navigation situation. Results: The result demonstrated that the ecological interface's performance was better than the existing radar display on performance time and subjective mental workload. Conclusion: This study expand EID study field to navy ship radar display and confirm ecological display is better than existing radar display in performance time, subjective mental work load. Application: The result of this study may help to improve navy ship navigation radar display currently in use.

• 대한인간공학회지
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• 제29권4호
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• pp.661-665
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• 2010

Current subway station's office employee must perform safety management tasks by monitoring the various safety management systems. But these monitoring systems are limited in effective situational awareness and response to a state of emergency immediately. It is necessary to develop an integrated safety management system display. In this study, we developed subway station safety management system's (CCTV, fire detection & alarm system, screen door control equipment) integrated prototype display with ecological interface design framework and evaluated prototype display interface's usability with GOMS model. The result was that the ecological interface's performance was better than existing safety management system's interface.

• 대한인간공학회지
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• 제26권4호
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• pp.127-133
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• 2007

The purpose of this study is to apply WDA (Work Domain Analysis) for the development of EID (Ecological Interface Design) of vehicle control display. At first, a work domain model on the automobile operation was developed using the AH (Abstraction Hierarchy) which is one of WDA tools. Secondly, information requirements that should be included in vehicle control displays were extracted on the basis of the completed model. The vehicle control information that typical automobiles interface displays currently provide occurred on the low level of the work domain model. This implies that current control displays impose too heavy cognitive workload on automobile drivers. Information requirements that can be included new vehicle control display are also discovered in the high level of the work domain model. The detailed information for EID was not proposed in this study. In the further study, the development of vehicle control display will be deeply conducted, using the results of this study.