What is the difference between regular job safety analysis and hazop?

Mr. Nawar, job safety analysis analyses a job description and its risks, while HAZOP analyses description and design of whole system  and its risks and errors in deviation from the system. Best regards Valentina

dear Mrs\\ Valentina what I have experienced job safety analysis depending on job steps and how we can secure it and it is a part of the four assessments that i should do to cover the four items personnel, materials, machine and work environment, that's what i do, Now please could you explain the main stages of HAZOP ?