SOPs SWIs etc.

It is important to note that while there is a documentation structure procedure, ISO 10013:2001, this structure is not required in the ISO management systems. It is a structure that is recommended for complex systems, but smaller companies do not need to have this sort of complex, multi-level system.

In this system, a policy is the top level, and gives the statement of intent on something. So, a policy that hazard identification will be done and why would be in a policy. A procedure is intended to give the who, what where, when and why of the activity. So, a procedure will give these details of the hazard identification. The work instruction gives the step-by-step instructions of how to do something, like how to do the hazard assessment, or how to actually do a process step-by-step to ensure safe operation.

Of course, nothing dictates that these need to be separate. You can include policy statements, procedure statements and step-by-step instructions in one document if you wish; including different sections for each work instruction for each type of welding. As stated at the beginning, this is the sort of structure that a large company might use, and is not necessarily required. To avoid duplication each work instruction will link to 1 procedure, and several procedures may link to 1 policy.

You can read more on the ISO documentation model in the following article from the 9100Academy that is applicable to all ISO management systems: How to structure AS9100 Rev D documentation, https://advisera.com/9100academy/knowledgebase/how-to-structure-as9100-rev-d-documentation/