I have to schedule breaks and lunches, you don't follow it? Documented conversation. If they radio me (or a pacesetter when I'm off) and say they were supposed to go to lunch in 10 minutes, should they go now, or it just dropped a ton should I grab another batch then that's ok. I've emphasized with them how much they screw each other over when they go to lunch too close together, go to break at the same time, call out a lot, etc... I hate micromanaging them at times, but when it's necessary I have to.
For metrics teach them how to read MPM and tell them where they need to be. I made goal sheets to see how much they should be picking and they fill in their units, speed, and INF. They should know how they are doing when I ask. I also print out recaps each week with the most units, highest speed, and highest and lowest INF. They get competitive with each other and want to see their names on top. The ones who don't care? Performance them out. My team has bad days, but if they are upset about their performance that shows me they care, they fight to get back to green, ask for help, etc... The ones who don't care won't do that, if anything they spread that bad attitude.
Lately we have had to write down who is using what carts for opu so I can keep track of them better. You should be starting a new batch immediately on the floor, not strolling to the back and doing it there. I also have to watch TMs who only pick regular or only pick grocery even if another batch is lower on time.
With OPU they need to be picking 4-6 batches at a time from 4am-8am to get it done on time. After that regular opu should be 2-3 at a time depending on batch sizes. If it's an hour or more you can do at least 2.
Teach them to ignore pathing. Start a batch, look at the tasks, skip to the area you are nearest. If they don't find something right away, skip it and get everything else, then go back and look. Utilize other TMs for help. Share RFID guns. I ordered 4 more, and extra batteries with chargers.
I became a TL to a team where their old lead checked out and didn't even tell them they were leaving. I got dropped into it when SFS went insane at the beginning of the pandemic. It was hard. It still is. I'm still learning, we are all adjusting to the constant changes.