Problems | Severity | Violations (see Appendix A) |
Not enough information to support supervisor’s SA of the sprayer’s health, status, and activities | H | 1.1, 1.3, 1.4 |
Hard to differentiate between automation mode and manual mode (when the supervisor intervenes). | H | 1.2 |
No change in color of boom height even at undesirable state | H | 1.2, 6.5, 7.3 |
Misleading orientation of the video feeds | L | 2.6. 7.10 |
Difficulty interpreting application rate value | H | 4.2, 4.7, 5.5, 7.6 |
Lack the ability to draw the attention of the supervisor when looking away from the interface | H | 4.3 |
Ability to comprehend direction of travel | L | 4.6 |
Log-on security | H | 6.3 |
Room for expansion to accommodate remote supervision of multiple autonomous machines | L | 5.2, 5.3, 5.4 |
Ability to remotely turn on/off the ignition and the sprayer’s onboard computer system | L | 6.6 |
Legibility issue with labels, and coverage map. | H | 7.4 |
Difficulty perceiving tank level due to label overlap and wide margin of the linear scale | L | 7.4 |
Pop-up weather page hinders the user from perceiving the tank level and application rate reading | H | 7.4 |
Cluttering of vertical linear scales | L | 7.4, 7.13 |
Misleading speedometer color coding | H | 7.5 |
Inability to discriminate between clickable buttons and labels | H | 7.7 |
Tank size deviated from user’s mental model | L | 7.9, 7.15 |
Positioning of frequently used elements | H | 7.11 |
Using only one modality—visual (that is already saturated), to convey warning | L | 9.5, 9.6 |