If a JHA is required for many tasks, priority should go to the following types of jobs, in order of priority:
- Jobs with the highest injury or illness rates
- Jobs with the potential to cause severe or disabling injuries or illness, even if there is no history of previous accidents
- Jobs in which one simple human error could lead to a severe accident or injury
- Jobs that are new or have changes in processes and procedures
- Jobs complex enough to require written instructions.