类别 全部 - evaluation - requirements - usability - prototyping

作者:Kuttymbek Daniyar 6 年以前

515

HCI

Human-Computer Interaction (HCI) centers on designing and evaluating computer-based systems with a strong emphasis on user experience. The primary aim is to enhance system usability by understanding users, their tasks, and their environments.

HCI

HCI

HCI involves the design, implementation and evaluation of interactive computer-based systems

The focus is on the user, their tasks and their environment

The key goal is improving the usability of the system

HCI is about

Understanding people, their tasks and environment

Developing appropriate interfaces and interaction techniques

Evaluating and comparing interfaces

Developing methodologies for designing interfaces

Usability

Metrics - Quantitative Measures
Guidelines and Principles

Guidelines and Principles provide the designer with a framework to provide support for the user in achieving the above points

Definition

ISO 9241 Standards


The effectiveness, efficiency and satisfaction with which specified users achieve specified goals in particular environments.

effectiveness: the accuracy and completeness with which specified users can achieve specified goals in particular environments

efficiency: the resources expended in relation to the accuracy and completeness of goals achieved

satisfaction: the comfort and acceptability of the work system to its users and other people affected by its use


Acceptability

Political – is the design politically acceptable? Do people trust it? Do people see it as enhancing their abilities or are they threatened by it?

Convenience – Level of awkwardness, change in behaviour

Cultural and Social habits – Disturb people, human contact – reassurance.

Usefulness – In the context of everyday living

Economic – value for money, change the way people work



Engagement (eg. for game interfaces)

Identity – a sense of authenticity

Adaptivity – personalisation – responsiveness to changing skills

Narrative – telling a good story

Immersion – quality of design

Flow – sense of smooth movement


Usability is...


Helping people access, learn and remember the system …

Visibility

Consistency

Familiarity

Affordances

Giving them the sense of being in control, knowing what to do and how to do it …

Navigation

Control-Dialogue initiative, Mapping

Feedback

Safely and securely …

Recovery

Constraints

In a way that suits them …

Flexibility

Style

Conviviality

Evaluation

Implementation Frameworks
Techniques

User Studies

Analytical Evaluation

Considerations

Choosing an Evaluation Strategy

User-Centred Design

In an iterative UCD process

Designers move rapidly between requirements, conceptual design, physical design, evaluation, prototyping and envisionment

Evaluation is central to the process.

Distinguishing conceptual and physical design is very important to ensure a good allocation of function between people and technologies

Prototyping and envisioning ideas is crucial to understanding requirements and design ideas

Envisionment


Envisionment is concerned with finding appropriate media in which to render design ideas.

Designs need to be visualized

to help designers clarify their own ideas

to enable people to evaluate them.

The medium needs to be appropriate for

the stage of the process,

the audience,

the resources available and the questions that the prototype is helping to answer.


Forms of Envisionment


Sketches and Snapshots

Storyboards

Mood boards

Navigation maps

Mind maps

Scenarios

Prototyping

Requirements Analysis
Types of Requirements

Functional


Non-Functional


Data

Type , Volatility, size/amount, persistence, accuracy

Environment

Physical

Social – collaboration and coordination,

Organizational – user support, training, validation, resources, management

User

abilities and skills, frequency of use, novice, casual or expert

Usability

learnability, efficiency, effectiveness, safety, memorability

Sources of Information

Documentation

Observation

Interviews

Focus Groups

Questionnaires

Similar Products

Cultural Probes

Creative Alternatives