A risk we are currently working on mitigating is the battery of the bench sensors dying to early. To extend the battery life, several strategies were employed. The first strategy consisted of changing the software on the bench sensor module to only connect to WiFi when sending requests because WiFi is very power hungry. Additionally, an extra battery pack was added to the sensor module to increase the life as well.
Another risk was with how our occupancy data was being stored. There were many occasions where occupancy was being logged 2-3 times per hour instead of just one. These entries were merely duplicate entries. To solve this problem, I am currently working on a Python script that will clean all of our data.
As previously stated, more batteries were required for the sensor module. No extra cost was incurred because we already had bought extra batteries. Additionally, we plan on adding a feature that predicts the probability of bench occupancy at a given time. No other changes were made to the existing design.