Wireless Usability Issues in wireless phones’ device/service usability Hyun Joo LEE LIS 385 T.6: Software Usability Engineering February 20, 2003
- Wireless phone serv ices and networks
- Web-enabled mobile phone usability
- An insight for the wireless usability testing
- What is Wireless Usability?
- : “ the users’ perception of the quality” of wireless device/service, which is based on the” users’ ease of use, ease of learning and relearning” (Barnum, 2002)
- : the device/service’s intuitiveness for the user, and the user’s appreciation of the usefulness of it
- Portability (Mobility), Flexibility, etc.
Wireless phone serv ices and networks
- 1 G : first generation cell phones, analog technology
- 2 G : second generation cell phones, digital,
- offer data services (text messaging and Web access)
- 2.5 G : a transitional generation of phones,
- higher speed data (40 Kbps ~144Kbps) access.
- General Packet Radio Service (GPRS) networks
- 3 G : third generation networks, packet switching
- much higher speed connectivity (384Kbps~ 2 Mbps)
- - SK Telecom IMT 2000, KOREA(ROK)
Devices and 3G PAGERS Mobile phones PDAs COMMUNICATORS Built-in CCD camera Packet data transmission images as e-mail attachments
3G mobile-multimedia phone
- i-mode has transformed the mobile phone from a tool for voice communication into an all encompassing information tool.
- i-mode was developed as a packet-switched high-speed (9600) system.
- Unlike voice calls, which are circuit-switched connections requiring dial up, i-mode’s data connections are packet switched, meaning the data connection is “always on ”
2. WAP (Wireless Application Protocol)
Internet WAP gateway Communication tower Web server Mobile phones http://www.useit.com/alertbox/20001210.html
- Standard in Europe, North America
- Connectivity of wireless devices depend on network reliability, power supplies such as battery life and so on.
Web-enabled m obile phone usability
- -Display screen, input devices
- -Peripherals and Expansion (Elden, C.R.)
2. focus group
- complex application user,
- high-income and high net worth
3.Device and user interface elements
- Mechanism (selection v. typing )
- GUI (graphical user interface)
- -Menus, Popup Menus, Text entry fields, Check boxes, Radio buttons, Icons and push buttons
4. Device checklist example
- Is the screen legible under both good and poor lighting?
- Are the controls intuitive for both voice and WWW use?
- Can they have be used by people of varying hand size and fingernail length?
- Do they have a minimum of 6 lines of text visible?
- Is the screen legible to older users?
- Is the speaker volume loud enough?
- rapid-chargers available for road warriors?
5. Service checklist examples
- Is there adequate service to employee’s offices,
- travel routes, and homes?
- Check both voice and web access coverage areas.
An insight for the wireless usability testing
- Ease of use and ease of learning
- Case studies and developing usability procedure are necessary for designing and testing for the wireless devices/services.
- In the usability study, effectiveness, efficiency, satisfaction of the wireless devices and services based upon users’ perspectives are the three major components to be considered.