Answer: Internal benchmarking
Explanation:
Benchmarking on its own is a process that companies use to improve and it works by them comparing certain aspects of their business to others to see if they can do better.
This process can be internal as well and the scenario described is one such example. When employees compare their cases to see how to handle it better, they are comparing aspects of the business in order to grow the business so this falls under benchmarking.
