"When interviewing to be a production engineer, you will likely be asked many technical questions about your understanding of manufacturing processes. Interviewers will want to determine whether you will be able to find ways to improve their production processes, whether that be through increasing safety, reducing waste, or increasing output. They will also be concerned about your ability to simplify the explanation of complicated processes to workers and managers who do not have the same education in engineering as you do. Production engineers are required to have at least a bachelor's degree in engineering."
Do you see operators as a good source of information?
Yes, they definitely are a good source.
Not only are they a good source of information, they are a valuable source. They are they most familiar with the operations, they are the best starting point when troubleshooting.