I would target your food items and no worry about "company wide" stuff....that really belongs with head office. If you work for a very large multi site company, they probably have an 'official statement of policy" for fraud that you can include in the evaluation
The last very large company I worked for when audited to FSSC didn't give two hoots about corporate policy-with 1 exception-the recall plan, for obvious reasons (they would be the ones issuing press release et all)
Corporate cannot help you if you don't have control over your facility and what happens inside those walls.....which isn't to say a head office purchasers couldn't knowingly or unknowingly approve a vendor who generates "fraudulent" raw materials
Like this "Researchers in India have found two of nine samples of black pepper to have been adulterated with chilli powder. India is the world's largest exporter of spices. 24/08/2016 Powdered spices are at very high risk of fraudulent adulteration, substitution and dilution. The risk is expected to remain high for the foreseeable future." So if corporate is responsible for approving vendors, then you MUST include the corporate plan AND FOLLOW IT
Does that help?