Level 1: Prevents Task Completion
The issues classified at this level were the most critical ones. Normally the users can’t correct them by themselves or even know it is incorrect.
| Tasks | Issues |
|---|---|
| 2. Summary screen perception Does the participants realize what happened with the interface? What happened there? |
-The blocks on summary screen should be clickable; [a] -The battery is showed as it is 100% even it is not; -Tooltips on mouseover; -Don't know the main purpose/action on each page. [b] |
| 3. Plan a mission Create a mission plan |
-Waypoints don't follow a logical sequence; -The numbers on boxes doesn't match with waypoints on the map; -It is hard to find current location on plan tab; [c] -Not easy to add waypoints on map, don’t know where to start; [d] -The button “Move map to home” position induces the user’s error; [e] -The menu to edit the waypoints doesn’t look clickable; -Users aren’t familiar with terms like ‘return home’, land, take off, etc., what cause frustration at the time to create a mission; -It is not clear how to send the mission to the vehicle. [f] |
| 4. Calibrate the compass | -Don't know how to start the calibration; -Don't know how to move to next steps. [g] |
| 5. Run the mission | -The message box is over the arm button on fly tab; -Arm button should be close to flight modes; -No information about time out to arm or take off; -Not clear it's necessary to change the flight mode to start the mission. |
[a] “I have no idea where to click.” (participant quote)
[b] “The screen seems to be organized, but it does not say anything. What do I do with this information?” (participant quote)
[b] “What do I do with this?” (participant quote)
[c] “I’d like to have a search just like Google Maps.” (participant quote)
[d] “Let’s try clicking on everything.” (participant quote)
[e] “You know how it is: you see then click.” (participant quote)
[f] “I have the impression that if I send [the mission] to the drone, it will fly away.” (participant quote)
[g] “I’m understanding anything.” (participant quote)