Which program might a site need to review if an auditor noted that a door was left open?

When an auditor notes that a door was left open, the most relevant program to review would typically be related to food defense. Food defense focuses on protecting food from intentional contamination or tampering. An open door could potentially allow unauthorized access to the site, raising the risk of food safety hazards due to contamination or sabotage. It indicates a lapse in security measures that should be implemented to protect food products from external threats.

In contrast, sanitation generally addresses cleanliness and hygiene in food handling areas, which may not be directly linked to the issue of an open door. Quality assurance focuses on ensuring that the processes and products meet quality standards, while staff training pertains to educating personnel on procedures and protocols. While those aspects may also need to be considered in a broader context of food safety, they do not directly address the immediate security concern raised by the open door.