Danielle didn't have any related experience before she changed her career path to this operation job, which means she only had one-year experience in the field. She literally wasn't capable of moving to the supervisor level.
Unfortunately, the operation team was having manpower issues: the supervisor and other senior specialists resigned, making Danielle the most senior team member at that time.
While we worked on finding an experienced operation supervisor to lead the operation team, I hired an assistant and asked Danielle to help handling routine work of the operation supervisor.
The conversation began after we had the operation supervisor hand-over meeting.