Wireless Phone Usability


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Wireless Phone Usability

  1. 1. Wireless Usability Issues in wireless phones’ device/service usability Hyun Joo LEE LIS 385 T.6: Software Usability Engineering February 20, 2003
  2. 2. Contents <ul><li>Introduction </li></ul><ul><li>Wireless phone serv ices and networks </li></ul><ul><li>Wireless connectivity </li></ul><ul><li>Web-enabled mobile phone usability </li></ul><ul><li>An insight for the wireless usability testing </li></ul><ul><li>Conclusion </li></ul>
  3. 3. Introduction <ul><li>What is Wireless Usability? </li></ul><ul><li>: “ 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) </li></ul><ul><li>: the device/service’s intuitiveness for the user, and the user’s appreciation of the usefulness of it </li></ul><ul><li>Why Wireless? </li></ul><ul><li>Portability (Mobility), Flexibility, etc. </li></ul>
  4. 4. Wireless phone serv ices and networks <ul><li>1 G : first generation cell phones, analog technology </li></ul><ul><li>handled only voice </li></ul><ul><li>2 G : second generation cell phones, digital, </li></ul><ul><li>offer data services (text messaging and Web access) </li></ul><ul><li>2.5 G : a transitional generation of phones, </li></ul><ul><li>higher speed data (40 Kbps ~144Kbps) access. </li></ul><ul><li>General Packet Radio Service (GPRS) networks </li></ul><ul><li>3 G : third generation networks, packet switching </li></ul><ul><li>much higher speed connectivity (384Kbps~ 2 Mbps) </li></ul><ul><li>- SK Telecom IMT 2000, KOREA(ROK) </li></ul><ul><li>- NTTdocomo, Japan </li></ul>
  5. 5. Devices and 3G PAGERS Mobile phones PDAs COMMUNICATORS Built-in CCD camera Packet data transmission images as e-mail attachments
  6. 6. 3G mobile-multimedia phone <ul><li>1. i-mode </li></ul><ul><li>i-mode has transformed the mobile phone from a tool for voice communication into an all encompassing information tool. </li></ul><ul><li>i-mode was developed as a packet-switched high-speed (9600) system. </li></ul><ul><li>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 ” </li></ul>
  7. 7. 2. WAP (Wireless Application Protocol) <ul><li>Standard in Europe, North America </li></ul><ul><li>WAP architecture </li></ul>Internet WAP gateway Communication tower Web server Mobile phones http://www.useit.com/alertbox/20001210.html
  8. 8. Connectivity <ul><li>Connectivity of wireless devices depend on network reliability, power supplies such as battery life and so on. </li></ul><ul><li>‘ Always-on’ connections </li></ul>
  9. 9. Web-enabled m obile phone usability <ul><li>1. Consumer issues </li></ul><ul><li>-Display screen, input devices </li></ul><ul><li>-Transport </li></ul><ul><li>-Battery life </li></ul><ul><li>-Communication </li></ul><ul><li>-Peripherals and Expansion (Elden, C.R.) </li></ul>
  10. 10. 2. focus group <ul><li>novice and savvy, </li></ul><ul><li>Internet savvy, </li></ul><ul><li>teenager or senior, </li></ul><ul><li>phone savvy, </li></ul><ul><li>everyday consumer, </li></ul><ul><li>physically challenged, </li></ul><ul><li>complex application user, </li></ul><ul><li>online transaction user, </li></ul><ul><li>high-income and high net worth </li></ul><ul><li>geo-specific </li></ul>
  11. 11. 3.Device and user interface elements <ul><li>Mechanism (selection v. typing ) </li></ul><ul><li>User-centered </li></ul><ul><li>Consistency </li></ul><ul><li>GUI (graphical user interface) </li></ul><ul><li>-Menus, Popup Menus, Text entry fields, Check boxes, Radio buttons, Icons and push buttons </li></ul><ul><li>Readability- Anti-Glare </li></ul>
  12. 12. 4. Device checklist example <ul><li>Is the screen legible under both good and poor lighting? </li></ul><ul><li>Are the controls intuitive for both voice and WWW use? </li></ul><ul><li>Can they have be used by people of varying hand size and fingernail length? </li></ul><ul><li>Can they be one-handed? </li></ul><ul><li>Do they have a minimum of 6 lines of text visible? </li></ul><ul><li>Is the screen legible to older users? </li></ul><ul><li>Is the speaker volume loud enough? </li></ul><ul><li>rapid-chargers available for road warriors? </li></ul>
  13. 13. 5. Service checklist examples <ul><li>Is there adequate service to employee’s offices, </li></ul><ul><li>travel routes, and homes? </li></ul><ul><li>Check both voice and web access coverage areas. </li></ul>
  14. 14. An insight for the wireless usability testing <ul><li>Ease of use and ease of learning </li></ul><ul><li>Reliability </li></ul><ul><li>Situated environment </li></ul>
  15. 15. Conclusion <ul><li>Case studies and developing usability procedure are necessary for designing and testing for the wireless devices/services. </li></ul><ul><li>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. </li></ul>