|
| Frequency | Problem # | Severity | Description |
|
| 12 | 9 | Major | State name cannot be abbreviated (DC, Washington DC) |
| 11 | 10 | Minor | System freeze |
| 10 | 14 | Minor | No way to enter highway intersection as destination |
| 10 | 42 | Major | No intuitive method to save radio frequency as preset |
| 9 | 2 | Major | Difficult to switch keyboard to number keys |
| 9 | 20 | Major | Could not search for an XM channel by name, so they browsed the numeric listing, which was slow |
| 9 | 24 | Critical | Typed building number in the street name (north/no) |
| 9 | 35 | Major | Searching for an iPod song by title was very time-consuming |
| 8 | 4 | Minor | Guidance voice quality was inadequate |
| 8 | 6 | Critical | No intuitive method to cancel route/destination on map screen |
| 8 | 7 | Major | Buttons are easily confused with displays |
| 8 | 8 | Major | Expected this interface to support multitouch, in particular 2-finger zooming |
| 8 | 17 | Minor | Correct address rejected (wrong house number range) |
| 7 | 28 | Major | Did not realize what the search button did (also used for enter) |
| 7 | 29 | Major | Incomplete and insufficient text information |
| 7 | 37 | Critical | No alphabetic input method for numeric street name (Fifth Ave) |
| 6 | 3 | Minor | Negative response to autosuggest keyboard (autocomplete function) |
| 6 | 13 | Major | Did not realize there were multiple pages for destination screen |
| 6 | 32 | Major | Confusing intersection search guidance (“X”, “space”) |
| 6 | 36 | Major | No intuitive method to store the entered address/home address |
| 6 | 45 | Major | Did not understand icons on the map window (Z, compass, flag, current position, scale) |
| 5 | 23 | Major | Typed building number in the street name |
| 5 | 26 | Major | Did not understand the acronym POI |
| 4 | 5 | Major | Did not understand POI symbol/function on the map |
| 4 | 16 | Minor | Search displayed multiple entries for the same destination (3 Ann Arbor) |
| 4 | 22 | Major | Difficult to switch to alphabet keys |
| 4 | 25 | Critical | No intuitive method to search for a waypoint and add it as a waypoint on the map screen. |
| 3 | 11 | Minor | Too slow/fast system response time |
| 3 | 12 | Minor | Address/text information was not legible |
| 3 | 27 | Major | Did not recognize scale button on the map screen |
| 3 | 30 | Major | No way to back up (e.g., main mode screen, simulation mode, and local POI) |
| 3 | 33 | Minor | No intuitive method to bring up CD control after inserting CD |
| 3 | 34 | Major | Did not understand label SAT |
| 3 | 38 | Major | Did not understand label Zagat |
| 3 | 39 | Major | Did not recognize back button |
| 3 | 40 | Minor | Unable to get to CD mode after inserting CD |
| 3 | 41 | Major | Did not understand Autostore |
| 3 | 44 | Major | Did not understand icons on the status bar |
| 3 | 57 | Major | No intuitive graphic to select the searched result on the list (city/street) |
| 2 | 46 | Minor | Scale window disappears too quickly on the screen |
| 2 | 48 | Major | Narrow search coverage by POI Name (no support for McDonalds) |
| 2 | 50 | Major | Did not recognize the delete button on keyboard |
| 2 | 64 | Major | Did not understand label Map key |
| 1 | 1 | Minor | State name is highlighted and shown on Search by Address screen. |
| 1 | 15 | Minor | Confusing search result (Ann Arbor/Ann Arbor Twp) |
| 1 | 18 | Minor | Misunderstood seek/track button label |
| 1 | 19 | Minor | Did not notice volume label |
| 1 | 21 | Major | No intuitive distinction between Route and Dest key |
| 1 | 31 | Minor | Wrong screen instruction (“search by POI” in intersection) |
| 1 | 43 | Minor | Did not understand label Dest |
| 1 | 47 | Minor | Select button location was inconsistent |
| 1 | 49 | Minor | Did not understand “Alternative” menu |
| 1 | 51 | Minor | Misunderstood Asian, Korean, and Chinese on POI list (as language) |
| 1 | 52 | Minor | No way to control volume on the screen |
| 1 | 53 | Minor | Did not understand preset scan |
| 1 | 54 | Minor | Misunderstood ATM and Bank on POI category list |
| 1 | 55 | Minor | Wrong unit information/temperature |
| 1 | 56 | Major | Did not understand play/stop icon |
| 1 | 58 | Major | Did not understand numbers next to the searched street names |
| 1 | 59 | Major | Not able to set clock in expected manner |
| 1 | 60 | Major | No intuitive layout for house number input |
| 1 | 61 | Minor | Did not understand orange line on the map |
| 1 | 62 | Minor | No autosave feature in entering city |
| 1 | 63 | Minor | Confusing categorization on POI list (gas station-travel/automotive) |
|
