4.1 understand user interface
evaluation of user interface
mainly consisted of process control screens that allowed that user to send commands to the system
worked well with traditional systems that simply transformed input data into structered output
user-centered system
requires an understanding of human-computer interaction and user-centered design principles
principles of user-centered design
understand the bussiness
maximize graphical effectiveness
think like a user
use models and prototypes
document everything
invite feedback
focus on usability
8 basics guidelines when you create a user interface you should follow
design a transparent interface
create an interface that is easy to learn to use
enhance user productivity
make it easy for users to obtain help or correct errors
minimize input data problems
provide feedback to users
create an attractive layout and design
use familiar terms and designs
click to edit
user interface components
check box
switchboard
calendar control
screen elements control
menu bar
toolbar
drop-down list box
option button or radio button
command button
dialog box
text box
toggle button
list box-scroll bar
source documents
collect input data
triggers or authorizes an input action, and provides a record of the original transaction
paper-based, but also can be provided online
developed during input design stage
good form layout makes the form easy to complete and provides enough space
a form should indicate data entry positions clearly using blank lines or boxes and descriptive captions
the placement of information on a form also is important. source documents typically include most of the zones shown