Final answer:
Supervisors must document completed training and other important information to prevent mishaps in the workplace.
Step-by-step explanation:
Supervisors must document completed training to prevent mishaps. In addition to training documentation, supervisors must also keep accurate records of work-related injuries and illnesses, perform tests required by OSHA standards, provide personal protective equipment at no cost to workers, and notify OSHA in case of workplace fatalities or hospitalizations. They should also prominently display the official OSHA poster that describes rights and responsibilities under the OSH Act.