| Attribute | Description |
| The role of the human [15] | Plan the spraying operation and allocate resources. Prepare and transport the sprayer to the field. Deploy the sprayer(s) to commence operation. Monitor the operation remotely. Transport material like chemical to the field. Track issues across the field. Intervene when necessary (modify plan, safety issues, and repairs). Retrieve the sprayer at the end of the operation. Manage other farm duties or personal events |
| Machine health and spraying status [14] | Frequently needed/used: Engine speed, hose leakage, wireless signal (GPS) status, agitator status, travel speed, wind speed, wind direction, spray pressure, application rate, nozzle status, boom height, skip/overlap, tank level, ambient temperature, area covered. Occasionally needed/used: Fuel level, engine temperature, engine oil pressure, and relative humidity. Rarely needed/used: Battery status, tire pressure, tire slippage, and time since last fill. |
| Navigation features [14] | Frequently needed/used: Direction of travel, and current location. Occasionally needed/used: Distance traveled, global field view, and route taken. |
| Video footage [14] [16] | Views needed: Right boom, nozzle status (plugged or not), spray pattern, obstacles in front or sides, poor areas in the field, wet spots, approximate travel speed, headlands, type of crop being sprayed, weather (windy and sunny), application rate, boom height, location of the sprayer, overall picture of the field (i.e., aerial view), and if the sprayer was moving and following the right path (moving straight). |
| Warning/Notifications [14] [17] | Parameters: Plugged nozzle, machine breakdown, Obstacle detection, loss of GPS signal, unexpected shutdown, tank level drop, fuel level drop, route change, task completed, skip/double application. Medium: Visual-tactile (for close-to-the-field remote supervision). |