User Interface Design and Ergonomics - National Open University of ...

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UNIT 1 FUNDAMENTALS OF USER INTERFACE DESIGN Table of Contents 1.0 Introduction 2.0 Objectives 3.0 Main Content 3.1 User Interface 3.2 Significance of User Interface 3.3 Types of User Interfaces 3.4 History of User Interfaces 3.5 User Interface Modes and Modalities 3.6 Introduction to Usability 4.0 Conclusion 5.0 Summary 6.0 Tutor Marked Assignment 7.0 Further Reading and Other Resources 1.0 INTRODUCTION Having read through the course guide, you will have a general understanding of what this unit is about and how it fits into the course as a whole. This unit describes the general fundamentals of user interface design. 2.0 OBJECTIVES By the end this unit, you should be able to: Explain the term user interface design Highlight the significance of user interface Explain the history behind user interfaces Describe the modalities and modes of user interface 3.0 MAIN CONTENT 3.1 USER INTERFACE The user interface (also known as Human Machine Interface (HMI) or Man-Machine Interface (MMI) is the aggregate of means by which people—the users—interact with the system—a particular machine, device, computer program or other complex tool. User Interface is the point at which a user or a user department or organization interacts with a computer system. The part of an interactive computer program that sends messages to and receives instructions from a terminal user. 18
User Interface is the point at which a user or a user department or organization interacts with a computer system. The part of an interactive computer program that sends messages to and receives instructions from a terminal user. In computer science and human-computer interaction, the user interface (of a computer program) refers to the graphical, textual and auditory information the program presents to the user, and the control sequences (such as keystrokes with the computer keyboard, movements of the computer mouse, and selections with the touchscreen) the user employs to control the program. User interface design or user interface engineering is the design of computers, appliances, machines, mobile communication devices, software applications, and websites with the focus on the user's experience and interaction. The goal of user interface design is to make the user's interaction as simple and efficient as possible, in terms of accomplishing user goals—what is often called user-centered design. Good user interface design facilitates finishing the task at hand without drawing unnecessary attention to itself. Graphic design may be utilized to apply a theme or style to the interface without compromising its usability. The design process must balance technical functionality and visual elements (e.g., mental model) to create a system that is not only operational but also usable and adaptable to changing user needs. Interface design is involved in a wide range of projects from computer systems, to cars, to commercial planes; all of these projects involve much of the same basic human interaction yet also require some unique skills and knowledge. As a result, designers tend to specialize in certain types of projects and have skills centered around their expertise, whether that be software design, user research, web design, or industrial design 3.2 SIGNIFICANCE OF USER INTERFACE To work with a system, users have to be able to control the system and assess the state of the system. For example, when driving an automobile, the driver uses the steering wheel to control the direction of the vehicle, and the accelerator pedal, brake pedal and gearstick to control the speed of the vehicle. The driver perceives the position of the vehicle by looking through the windscreen and exact speed of the vehicle by reading the speedometer. The user interface of the automobile is on the whole composed of the instruments the driver can use to accomplish the tasks of driving and maintaining the automobile. The term user interface is often used in the context of computer systems and electronic devices. The user interface of a mechanical system, a vehicle or an industrial installation is sometimes referred to as the Human-Machine Interface (HMI). HMI is a modification of the original term MMI (man-machine interface). In practice, the abbreviation MMI is still frequently used although some may claim that MMI stands for something different now. Another abbreviation is HCI, but is more commonly used for human-computer interaction than human-computer interface. Other terms used are Operator Interface Console (OIC) and Operator Interface Terminal (OIT). 19
Page 1: ] NATIONAL OPEN UNIVERSITY OF NIGER
Page 4 and 5: National Open University of Nigeria
Page 6 and 7: Summary ...........................
Page 8 and 9: UNIT 3 - GRAPHICAL USER INTERFACE (
Page 10 and 11: Assignments File Tutor-Marked Assig
Page 12 and 13: 2 DESIGN and DESIGNING GOOD USER IN
Page 14 and 15: need both the study unit you are wo
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Page 24 and 25: Table of Contents 1.0 Introduction
Page 26 and 27: 3.1.1 DESIGNING A GOOD USER INTERFA
Page 28 and 29: widgets properly is to read and und
Page 30 and 31: Figure 1:- Showing that alignment o
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Page 36 and 37: Operating System. It is easy for a
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Page 40 and 41: collaborative work. For example, sc
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Page 46 and 47: window blinds to automobile braking
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Page 54 and 55: 3.6 BENEFITS OF ERGONOMICS The thre
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Motor skill which is a learned seri
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MODULE 2 UNIT 2 UNDERSTANDING USERS
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The users of a system must be ident
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This example brings up an important
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whether you want to have a palette
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Task analysis which includes identi
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MODULE 2 UNIT 3 USER CENTERED DESIG
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or small body text is also hard to
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Introduction to User-centered desig
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organizations themselves. Interacti
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After thorough analysis using vario
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Interaction design which is the dis
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In human-computer interaction and c
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The preferred method for ensuring u
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3.4 ISO STANDARDS FOR USABILITY ISO
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In this unit, you have been introdu
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affect the way the command is execu
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• Guides the user via the predefi
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The term direct manipulation was in
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There are two important reasons for
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UNIT 1 PROTOTYPING Table of Content
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Figure 12: The iterative steps of p
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select print Figure 13: An interfac
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Ambler, S.W. & Constantine, L.L. (2
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3.2 LOW-FIDELITY PROTOTYPES Low-fid
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Figure 14:- Example of Sketching II
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Much more important for features th
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DENIM, an extension of SILK, is a t
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• Encourage menu & forms style, r
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Another problem is that native widg
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interfaces, so that a realistic sim
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UNIT 3 INPUT AND OUTPUT MODELS Tabl
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Recall that perceptual fusion means
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3.2 OUTPUT MODEL There are basicall
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directly-mapped pixel image will no
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Most stroke models also include som
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UNIT 4 MODEL VIEW-CONTROLLER (MVC)
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3.3.2 AS A DESIGN PATTERN MVC enco
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The Views are XForms controls for s
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UNIT 5 LAYOUTS AND CONSTRAINTS Tabl
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3.5 CONSTRAINTS Constraints are rel
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MODULE 4 UNIT 1 TECHNIQUES FOR EVAL
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a. Card Sorting Card sorting is a w
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Rapid prototyping is a method used
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3.2.1 THE USE OF PROTOTYPES It is o
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Dumas, J.S. and Redish, J.C. (1999)
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the users' respect for you as a pro
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the users will be and what kind of
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speed whenever the average load was
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Table 4:- Table: Average times for
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phases: list the actions, and then
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Nielsen and Molich used their own e
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7.0 REFERENCES AND FURTHER READING
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users. If you do not, you can be ba
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If you are led to develop more and
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It's very easy to shape the comment
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a. Analyzing the Bottom-Line Number
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you use. But then you need some way
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ecruit test users with more similar
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MODULE 4 UNIT 4 OTHER EVALUATION IS
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3.2 CURRENT ISSUES CONCERNING EVALU
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2.0 OBJECTIVES By the end this unit
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It provides a real focal point for
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3.3.4 CONDUCTING THE TEST Having co
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The stages involved in usability te
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