Sorry for the delay - in facts all 25 facilities are independant therefore have individual certification. Part of the corporate profile, each facility uses several corporate services like QA, Sales, Purchasing, Logistics, HR, IT.... each manufacturing site is independant and none are on Multi-site certification - each have acheived their own certification. Corporate QA performes, once per year between 2 to 4 days audits depending on the site size. Our food safety audit reviews the SQF program, HACCP program and the corporate Food Safety and Securuty Policy. Our SQF modules are 2 and 11 no more.
Each year, I prepare an audit calendar that is send out for approuval by each site QC and plant managers - later an audti noticed is send out 2 to 3 weeks prior to the audit itself. But corporate QA manages all food safety and security audits and sned out an audit report per site to the audited site plus upper management. This program is what we call "Internal Audit" - plants for themselves will perform HACCP and SQF reevaluation each year plus a plant and documents review.
Thanks everyone for any input.