Hi!
I remember I started working at woolies when I was 14 and a half... it wasn't until just under three years later that I became a supervisor, and I was so relieved when I finally had it. I believe I earned it
About a year after I first started (when I was still a cashier) a girl who is three months older than me joined the team. Four months after she started, she was promoted to supervisor: there were some very unhappy frontend workers, especially ones who had just finished school and had been there A LOT longer than her.
So it does depend on your manager I guess, but it's hard to explain their thought process.
It might be worth just talking to the current supervisors, asking them how things are done, just show an interest in supervising, just that sort of general shit. In my opinion, it's a lot more fun, and most nights it is easy, being a smaller store.
Obviously, with great power comes great responsibility.
If you are not a supervisor, in my opinion, you shouldn't have numbers. If you watch the floor for the supervisors break, and need privileges, the supervisor can print of a barcode which you can use to override control checks and enter the supervisor menu.
Just tell her to sign on, go SVR MENU -> (across to next page) -> ISSUE BARCODE. They then enter their numbers again, and a small barcode will print. You can then use this to override Control Checks and access the supervisor menu.
Your frontend department will fail an audit if cashiers have supervisor numbers.