When should all preflight safety checks be completed?

Completing all preflight safety checks before customer boarding is crucial for ensuring the safety and security of passengers and crew. This timing allows flight attendants to identify any safety concerns or issues with equipment and address them proactively, before passengers enter the aircraft. By conducting checks before boarding, flight attendants can effectively ensure that all safety equipment is operational and that any necessary safety protocols have been followed, contributing to a safer travel experience for everyone on board. Completing these checks at this stage also helps in maintaining efficiency during the boarding process, as flight attendants can focus on passenger needs once they are on board without the pressure of needing to finalize safety checks at that time.