Onions need to be peeled before they are bunched.
I completed one of the tests after closing the lid and pouring water in between the 'pots'.
I then asked the farmers to complete the other tests to allow them to understand and participate in the process.
It was simple so this went quickly. All interface actions must be kept simple so that it is intuitive and the product can be used easily by any farmer.
One week later, I returned to see how the tests went. The units were still in the storage classroom that the farmers have access to. Unfortunately Earl didn't provide a filled in table for me. He could only tell me that the four main tests fared better then the control test that was placed on the tree stump outside. He did not refill the storage with water at 6pm and only checked the temperature and produce the next day at 12am. He did, however, say that he could still sell the produce that were in the containers over night for the same price. The ones outside were not sellable in Earl's opinion. He only gave one reading for all the tests and said that the temperature went down to 24 and then up to 25 at 12am the next day. This reading was even the same for the lunchbox test.
It is now necessary to replicate the testing in a more controlled manner. This will show if there is no difference between the four main tests as Earl suggests. Before I return to the farms with the second prototype, I will figure the cooling principle and include the one that works best under controlled testing. It must then also be successful in the context on the farms.
Once the principle has been figure out, the design on the storage unit and and all relating aspects can then be addressed.