1. Step-2: Understand the Business Function
Lecture-5
Computer Systems Interface

2. Computer Systems Interface
General steps
Perform a business definition & requirements analysis
Determine basic business functions
Define current activities through task analysis
Develop a conceptual model of the system
Establish system usability design goals
Define training & documentation needs
Computer Systems Interface

3. Business def. & Reqs analysis
To establish the need for a system
A requirement is an objective that must be met
Product description is developed & refined, based on input from users, marketing, or other interested parties.
Computer Systems Interface

4. Information collection techniques
Direct methods:
Individual face-to-face interview
Telephone interview or survey
Traditional focus group
Observational field study
User-Interface Prototyping
* Know thy users, for they are not you.
Computer Systems Interface

5. Information collection techniques (cont.)
Indirect methods:
MIS, Support, Marketing intermediary
Paper/electronic survey or questionnaire
, Bulletin Boards, or Guest Book
Competitor analysis
Other media analysis
Computer Systems Interface

6. Computer Systems Interface
Defining the Domain
What people say they do and what they actually do are often different – because people are not always aware of how they work.
Computer Systems Interface

7. Determining Basic Business Functions
A detailed description of what the product will do
Major system functions are listed & described
A flowchart of these is developed
Understanding user’s needs & the user’s profile
A user task analysis
Computer Systems Interface

8. Developing Conceptual Models
Defining objects
Defining metaphors
Describes how the interface will present:
Objects
Relationships
Properties
actions
Computer Systems Interface

9. Computer Systems Interface
Q/A
Develop conceptual model for your team project.
Computer Systems Interface