Guillotine Attached | 0.77 | 1.05 | 1.66 | 1.21 | 0.90 | 0.88 | 2.00 | 0.55 | 9.01 | 5 |
Guillotine Manual | 0.71 | 0.87 | 2.00 | 0.70 | 1.28 | 0.88 | 2.00 | 0.55 | 8.98 | 6 |
Pepper Grinder Attached | 1.00 | 1.90 | 1.30 | 1.99 | 1.50 | 0.61 | 1.60 | 1.00 | 10.91 | 1 |
Pepper Grinder Manual | 0.82 | 0.51 | 1.06 | 2.00 | 1.49 | 0.61 | 2.00 | 1.00 | 9.49 | 3 |
Scissors Attached | 0.63 | 2.00 | 1.94 | 1.99 | 0.02 | 1.50 | 1.20 | 0.39 | 9.67 | 2 |
Scissors Manual | 0.70 | 0.33 | 1.83 | 1.39 | 0.96 | 1.50 | 2.00 | 0.39 | 9.10 | 4 |
Time needed for harvesting - Duration of the reduced gravity phase Cutting Containment (bagging) Stowing bag Microgreens contamination within the glovebox - |
Harvester questionnaire - |
|
Harvest bags weights - Root contamination within harvest bags - |
Photos of harvested boxes - |
Time of Execution | Average total harvest time across all operators | Flight video analysis | Crew time needs to be minimized | 1 |
Microgreen Debris | Average debris counts across all operators | Flight video analysis | Loss of food and environmental safety hazard—needs to be minimized | 2 |
Yield (edible biomass) | Fresh mass adjusted by planting density | Post-flight weighing | Biomass production needs to be maximized | 2 |
Root debris | Average root debris counts across all operators | Post-flight count | Food safety hazard needs to be minimized | 2 |
Percentage of microgreens left on the hardware | Ratio between microgreen plants remaining on hardware and total plants | Post-flight count | Loss of food—needs to be minimized | 1.5 |
Number of seedlings growing under the lids | Average number across all units of a given hardware | Post-flight photo analysis count | Loss of food—needs to be minimized | 1.5 |
Percentage of no failures of the hardware | Ratio between number of hardware failure and total runs | Flight video analysis | Severe loss of food, potential food safety hazard—needs to be minimized | 2 |
Perceived ease of use | Average score across all operators | In-flight surveys | Mental health of crew—needs to be maximized | 1 |
Guillotine Attached | 9 | 4.03 | |||||||
Guillotine Manual | 11 | 4.03 | |||||||
Pepper Grinder Attached | 10 |
1.87 | |||||||
Pepper Grinder Manual | 9 |
1.87 | |||||||
Scissors Attached | 10 |
4.77 | |||||||
Scissors Manual | 9 | 4.77 |