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IT & ITS RELATED AND INFORMING DISCIPLINE Part 3 – Human Computer…
IT & ITS RELATED AND INFORMING DISCIPLINE
Part 3 – Human Computer Interaction(HCI)
What is HCI?
HCI is the study, planning and design for computer and user communicate so that a person’s needs are satisfied in the most effective way.
Functionality And Usability
Functionality is an action that provides function needed by users to perform their tasks.
Usability is system that can be used efficiently and adequately to accomplish certain goals for certain users
User Acitivity
User acitivity has 3 different level that is cognitive, physical and affective.
physical aspect determines the mechanics of interaction between human and computer.
Cognitive is a ways that users can understand the system and interact with it.
Affective is interaction a pleasurable experience for the user but also to affect the user in a way that make user continue to use the machine by changing attitudes and emotions toward the user.
User Centered Design (UCD) is is a user interface design process that focuses on usability goals, user characteristics, environment, tasks, and workflow in the design of an interface.
Human-centered design is an approach to interactive system development that focuses specifically on making systems usable. It is a multi-disciplinary activity.
6 Key Principles
The design is based on use requirement
user involve in design and development
The design is driven and refined by user-centered evaluation.
The process is iterative.
The design addresses the whole user experience.
The design team includes multidisciplinary skills and perspectives.
Importance user centered design
Satisfy user with user friendly system
increase loyalty and visit
UCD principle:
1 .Early focus on users and tasks
2.Empirical Measurement and testing of product usage
3.Iterative Design
UCD Process
Understand user need
Who are the users/stakeholders?
-those who interact directly with the product
users’ capabilities vary in many dimensions:
-size of hands may affect the size and positioning of input buttons
Existing tasks:
their context
Envisioned tasks:
can be rooted in existing behaviour
Method use to gather data
Observation / ethnography
Interview
Questionnaire
Focus groups
Participant analysis
Establish Requirement
-What do users want?
-Requirements need clarification, refinement, completion, re-scoping
-Input: focus problem definition; user analysis data
-Output: stable requirements
-Why ‘establish’?
Functional, Non Functional ,Data, Environment context of use, Users, Usability.
Design
In design field, a prototype is typically a smallscale model
Reason for prototype
-Evaluation and feedback central to interaction design
-Stakeholders can see, hold, interact with prototype
-Team members can communicate effectively
-Designer can test out ideas
Type of prototype
Lo-fi prototype
Mid-fi prototype
Hi-fi prototype
Evaluate
A continuous iterative process examining:
-Early prototypes of the new system
Looking for:
-Extent of functionality, effect of interface on user, specific problems/issues
Main type evaluate
Formative
Summative
Evaluation Method
Involving users
-‘quick and dirty’
usability testing
Involving experts
predictive evaluation
Holography
Holography is the science and practice of making holograms.
Hologram is a three-dimensional image formed by the interference of light beams from a laser or other coherent light source.