Download this free pdf from Harvard University on Job safety analysis to learn more: https://www.ehs.harvard.edu/sites/ehs.harvard.edu/files/job_safety_analysis_fact_sheet_0.pdf
According to Wiki:

A job safety analysis (JSA) is a procedure which helps integrate accepted safety and health principles and practices into a particular task or job operation. In a JSA, each basic step of the job is to identify potential hazards and to recommend the safest way to do the job. Other terms used to describe this procedure are job hazard analysis (JHA) and job hazard breakdown.

https://en.wikipedia.org/wiki/Job_safety_analysis