Dear Manish Anand,
Someone who has absolute responsibility and authority should get convinced that a particular job will be executed properly, timely and safely for him to give a green signal to start with the job. To that effect he should get a documented method statement for his approval from the one who is assigned with the execution. Usually it will be the engineer/supervisor who makes it.
Method statement spells out the scope of the work, tools and equipment that will be used, safety precautions that will be adhered to, tests that will be conducted if any at each stage, supervision, and every step on how the work will be actually performed integrating safety.
Though safety equipment that will be used and precautions that will be taken will also be included by the originator, it will be sent to the safety department for them to check and satisfy themselves about the safety concerns. If further recommendations are there from safety department, those will be added and endorsed by the safety in-charge. The method statement will be modified accordingly before submitting for final approval.
Hope it is clear.
Regards,
Kesava Pillai