Final answer:
The element of the DFO that would reinforce the resolution of the quality problem is training and development.
Step-by-step explanation:
The element of the Design for Operations (DFO) that would reinforce the resolution of the quality problem in this scenario is training and development.
By identifying that a new employee was working the grill during the shift with the undercooked food complaint, the assistant store manager can determine that the issue was likely due to lack of training and experience. To solve this problem, the assistant store manager can implement a training program for new employees, specifically focusing on proper cooking techniques and food safety. This would ensure that all employees have the necessary skills and knowledge to prevent undercooked food in the future.