Preference-Based Human Factors Knowledge Repository for Designing User Interfaces

This article proposes and describes a representational framework and a supporting tool environment for embedding and propagating human factors expertise into high level user interface design and development platforms. The proposed framework allows user interface designers to elicit, accommodate, and articulate user interface guidelines and results of experimental studies into reusable, evolutionary, and "living" design cases. The building blocks of the representational framework are a set of primitive constructs for consolidating the semantics of human factors knowledge into a design representation that characterizes the physical level of interaction. This is achieved through the development of a logical framework based on preference constraints and an initial set of preference and indifference expressions. The preference constraints provide a reasoning engine and a proof strategy for compiling a preference ordering of competing design alternatives and subsequently aggregating them into indifferent classes of design options per interaction element. The article also reports the implications of the proposed technique for user interface designers and the underlying requirements of user interface development platforms. Finally, the representational sufficiency of the proposed approach is discussed in the context of recent case studies aiming to consolidate human factors knowledge into a reusable repository supporting the ergonomic design of user interfaces in two example application domains, namely nonvisual hypermedia accessible to blind people and interpersonal communication aids for speech-motor-impaired and language-cognitive-impaired users.     

Modeling decisions under uncertainty in adaptive user interfaces

The present work proposes a methodological approach for modeling adaptation decisions and for solving the problem of integrating existing as well as acquired knowledge in the decision module of an adaptive interface. So far, most applications do not exploit in full the value of data originating from user models or knowledge acquisition engines that monitor the user and the context. The proposed decision theoretic model is represented through specifically structured influence diagrams. It provides to designers and developers a specific method to encode user and context information, as well as other crucial decision factors, to be subsequently used in the decision making process regarding user interface adaptation actions. Such a process is driven by the definition of relevant utilities referring to the design of a user interface. The proposed model guides designers and developers of an adaptive or intelligent interface to integrate, without conflicts and incoherence, design strategies, design goals, user goals, alternative constituents, user profile, context and application domain knowledge. An illustrative example of the analyzed modeling method is presented.

Automotive HMI design and participatory user involvement: review and perspectives

Abstract

Automotive human–machine interface (HMI) design is facing new challenges due to the technological advances of the last decades. The design process has to be adapted in order to address human factors and road safety challenges. It is now widely accepted that user involvement in the HMI design process is valuable. However, the current form of user involvement in industry remains at the stages of concept assessment and usability tests. Moreover, the literature in other fields (e.g. information systems) promotes a broader user involvement with participatory design (i.e. the user is fully involved in the development process). This article reviews the established benefits of participatory design and reveals perspectives for automotive HMI quality improvement in a cognitive ergonomic framework.

Practitioner Summary: Automotive HMI quality determines, in part, drivers’ ability to perform primary driving tasks while using in-vehicle devices. User involvement in the design process is a key point to contribute to HMI quality. This article reports the potential benefits of a broad involvement from drivers to meet automotive HMI design challenges.     

用户界面的情感化设计

为研究情感因素对用户界面设计的影响,打破基于物质性产品设计的传统设计原则,总结出适用于界面设计的设计原则。对物质性产品和非物质性产品(用户界面),这两类产品的分析,确定情感因素在用户界面设计中的重要性;同时应用两个用户界面的案例来分析情感化设计在用户界面设计中给用户带来了什么。探究情感因素对用户界面设计中的影响,并指导用户界面进行情感化设计。通过对物质性产品和非物质性产品的比较分析,得出设计有了本质上的改变,用户界面设计应打破传统的设计原则,即"形式追随功能",将用户的情感作为设计的主导,形成遵循情感因素的形式美法则。在用户界面中,以形式激发功能。     

Enhancing industrial performance: experiences of integrating the human factor

Abstract

Enhancing Industrial Performance refers to the case book that focuses on the effective implementation of sociotechnical innovation, describing real experiences with the management of the human-computer interface. It argues for an ergonomic approach to systems design and evaluation; human factors audits in systems prototyping; user participation in the design process; human-centred organizational design; and matching human resources with technological investment. In the paper, four case studies out of 15 are briefly described. It is stressed that the human-oriented design approach should be integrated in a company-wide manufacturing excellence programme. Finally, industry as well as universities need case studies.     

A fuzzy logic-based system for assessing the level of business-to-consumer (B2C) trust in electronic commerce

The purpose of this paper is to present an application of fuzzy logic to human reasoning about electronic commerce (e-commerce) transactions. This paper uncovers some of the hidden relationships between critical factors such as security, familiarity, design, and competitiveness. We analyze the effect of these factors on human decision process and how they affect the Business-to-Consumer (B2C) outcome when they are used collectively. This research provides a toolset for B2C vendors to access and evaluate a user's transaction decision process, and also an assisted reasoning tool for the online user.     

A Design Process for a Customer Journey Map: A Case Study on Mobile Services

A customer journey map (CJM) is a widely used tool to represent user experience with a service. Although numerous companies have used this tool to improve existing services or to develop new services, the maps are neither consistent nor mutually compatible because no clear design process for a CJM has been presented. This study aimed to develop a design process and rule sets for a CJM based on a human factors approach. The 10‐step process and the rule sets were built on case studies of 25 categories of mobile services. Large‐scale case studies were conducted with mobile service providers and combined with the result of a user diary method that collected users’ daily activities and the difficulties that the user perceived when performing a task. We suggested various methods for using the CJM to generate new service opportunities. The proposed design process and the way for opportunity discovery can help service designers to develop unified CJMs and to identify innovative service ideas.     

The development of human factors design guidelines

There is a growing information gap between the development of advanced human-machine systems, and the availability of human factors design criteria that can be applied during their design process. Despite increased interest in the development of human factors design guidelines, there also remains considerable uncertainty and concern regarding the actual utility of such information. Indeed, many existing human factors reference materials have been criticized by designers for being ‘too wordy’, ‘too general’, and ‘too hard to understand’. The development of clear, relevant, and useful human factors guidelines requires a judicious mix of science and art to overcome such criticisms. Specifically, while a number of empirical and systematic methods can be productively applied to their development, the final design guidelines will always represent a subjective integration of user requirements, design constraints, available information, and expert judgement. This paper summarizes procedures and heuristics associated with both the science and the art components of human factors design guideline development.     

Failure in the technical user-interface design process

Despite readily accessible guidelines, user interfaces are often inappropriate for their users. How is it that the technical design process fails to take proper account of human factors? This paper presents a catalogue of plausible reasons, which might be used to promote awareness of these issues amongst designers. Unless human issues are made explicit, the human impact of computer systems will be unpredictable, and systems will generally have to rely for their effectiveness on the enforced adaptability and misplaced respect for technology in their users.     

A study of a technological development process: Human factors—the forgotten factors?

The aim of this study was to explore how human factors were taken into account in the development of a new type of drilling equipment. This study is part of a larger project on the understanding of human factors in the design and implementation of automated drilling technology. The principal study was a longitudinal study lasting 4 years that involved 43 interviews, offshore and onshore observations, and two surveys. The analysis in this paper is based on seven informants who were either part of the design team or the paramount project team developing new automated drilling technology for an offshore oil- and gas-producing installation in the same development project, in addition to project documents. The informants were interviewed using semi-structured interviews, and grounded theory based on the coding process of Strauss and Corbin (Basics of qualitative research: grounded theory procedures and techniques. Sage, Newbury Park, 1990) was used to analyse the data. The core category was found to be insufficient human factor analyses performed in the development phase due to the two main categories, namely (1) insufficient information coordination and (2) narrow focus in different phases of the project. This was found to contribute to increased costs, low user-friendliness, and end users’ insufficient knowledge of safe usage and potential risks. Our conclusion was that homogenous top competence involving technical aspects contributed to developers’ lack of understanding of the need for sufficient analyses of end user requirements and of the tasks that would be affected by the new technology. Hence, we argue that technological development could benefit from including human factors experts from the project’s outset to bridge the gap between the lack of relevant information and sufficient information on which to base development decisions. In addition, we contend that performing human factors analyses throughout the development of a project would be beneficial due to the potential of hindering cultural aspects such as a non-questioning culture, which is viewed as a hazard in high-risk organizations.     

Development of an Intelligent Wheelchair Using Computer Graphics Animation and Simulation

A new robot simulator JC-1 is used as a control software development tool in a project in progress where an intelligent wheelchair for a blind user is being developed. The intelligent wheelchair is planned to be able to fulfill simple symbolic commands like "follow wall" or "follow object" and using the JC-1 simulator an evaluation team which includes e.g. the user, a rehabilitation engineer and a software engineer, can check control algorithms and user interface routines before constructing a real wheelchair prototype. The JC-1 simulator models the environment using simplified boundary- representation where objects, robot sensors and actuators are presented as symbolic objects in the graphics data-base of the simulator. In the JC-1 simulator a robot controller under development controls the motion of the graphical model of the robot while simulator commands or other robot controllers can be used to control the movement of disturbing obstacles. Computer graphics animation and simulation help to find fundamental design errors at an early design stage and as this paper suggests, enable the user of the final product to take part in to the designing process of the robot controller. Benefits and difficulties of using computer graphics simulation in the wheelchair development process are discussed.     

JSD and the design of user interface software

Systems analysis and design methods (SADMs), such as Jackson system development (JSD), have been proposed as a means of improving software quality. This is contrasted with the role of improving software usability proposed for human factors (HF). The paper argues the need for an explicit user interface specification stage in system development to ensure the usability of proposed systems. It is suggested that JSD supplemented by the specialist knowledge of HF can support such a specification stage. For HF and JSD to be successfully integrated, contributions from both need to be appropriately timed and structured. A model of the system development process that incorporates HF contributions is proposed. A means by which the HF contributions, in the form of a user interface specification, can be integrated with the JSD specification is developed and illustrated through examples.     

Cognitive ergonomics, socio-technical systems, and the impact of healthcare information technologies

The United States healthcare system is transitioning from paper-based to computer-based systems. In this process, it is vitally important to focus on optimizing the role of human factors in systems design. This review examines a wide range of cognitive ergonomics and socio-technical systems issues that impact the successful implementation of healthcare information technologies (HIT). We review evidence on the impact of HIT on medication errors, electronic health records and clinical support, copying clinical exams and notes, computerized-provider order entry and clinical decision support system, and bar-code medication administration systems. We examine research on barriers to successful HIT implementation and also on user workarounds of systems’ limitations. The review concludes by summarizing a series of important human factors design considerations that must be considered for successful systems implementation. This information is presented in a manner that should allow HIT system designers and implementers to readily incorporate these principles into their future developments.Relevance to industry: Evidence from a comprehensive review of the impact of HIT on a wide variety of important healthcare issues is presented and a series of human factors design considerations that are critical to successful HIT systems design is summarized.     

This month Remember,Remember…

This paper concerns one possible response of human factors to the need for better user interactions of computer-based systems. The paper is in two parts. Part I examines the potential for human factors to formulate engineering principles. A basic prerequisite for realizing that potential is a conception of the general design problem addressed by human factors. The problem is expressed informally as: ‘to design human interactions with computers for effective working’. A conception would provide the set of related concepts which both expressed the general design problem more formally, and which might be embodied in engineering principles. Part II of the paper proposes such a conception and illustrates its concepts. It is offered as an initial and speculative step towards a conception for an engineering discipline of Human Factors.     

Five steps to unlocking a Web site's potential

Companies such as Amazon.com and Dell Computers have experienced financial success in e-commerce by studying their users' human factors. Implementing a five-step process in developing their sites helped these companies ensure customer satisfaction: determine the functional level; determine the task flow level; design the high-level architecture; test the detailed design; and measure user satisfaction     

User interface design for cooperating agents in industrial process supervision and control applications

Computer systems based on cooperating agent architectures are currently introduced in industrial process supervision and control applications as operator support systems in tasks such as fault diagnosis, system restoration etc. Cooperating agents are relevant to these applications since they involve a high degree of physical distribution, the operators' decisions are often based on multiple conflicting views which can be moderated by the cooperating agents, and the domains are complex with high degree of modularity.In the frame of the research project ARCHON, a multi-agent system architecture has been defined in order to be used in industrial process supervision and control applications. An issue of high importance in this context is the interaction with the human operator and the design of a user interface which supports this interaction. The impact of multi-agent architectures on the user interface design of industrial process supervision and control systems is the subject of this paper. An example of an interface designed for a multi-agent system in the area of electrical network supervision is provided.     

Human-centric product conceptualization using a design space framework

Designing products to fit human needs, preferences and capabilities is an essential key to competitiveness. In contested product markets, the management of user-related knowledge is therefore critical. Studies have shown that the identification and implementation of user requirements are significant issues for determining successful product development, especially during the conceptual design phase. User requirements represented in a single or limited level of abstraction is inadequate for effective incorporation into the conceptual design process. Such representation of user needs is argued here to be associated with issues such as the errors of problem framing, which is a cause of inadmissible, uncreative or sub-optimal designs. In this paper, a human-centric knowledge organization structure, Design Space Framework, is established to facilitate the consistent incorporation of user information into the length of the product conceptualization process. The role of this structure in human-centric design is illustrated in a case study.