When auditing an integrated management system, one must consider the High-Level Structure of the management system standards. Auditing clauses 4, 5, 7, 9 and 10 is straightforward
When auditing an integrated management system, one must consider two realities of an organization:
Its processes; and
With clause 6 of each standard an organization determines risks around processes, products and business, compliance requirements, environmental aspects, risk of employee injury, and defines action plans and objectives.
When auditing, you follow an itinerary along its facilities where you audit processes (clause 8), and for each location the relevant environmental aspects and risks of employee injury and related procedures.