In the early stages it’s best practice to start developing a procedures document for each process. As you grow your team you need to ensure that consistency of process. Elect a systems champion to document the process. Sit them with whoever performs each task beyond the required standard, document exactly what’s being done then sit someone inexperienced in the seat to see if they can achieve the same standards by following the newly created document. If they struggle with any point, make changes to the document and start again. It sounds like a bit of a faff but it saves you training every new member of staff and ensures consistency.