ISO 9001 and restaurant

Answer:
If you believe you need ISO 9001 certification, perhaps you could benefit from attending a course about ISO 9001:2015 content, another about implementing a quality management system, and another one about performing internal audits. In my experience with hotels with restaurants, they look for kitchen consistency independently of the shift working.

The following material will provide you information about attending free courses:
- ISO 9001:2015 Foundations Course - https://advisera.com/training/iso-9001-foundations-course/
- ISO 9001:2015 Lead Implementer Course - https://advisera.com/training/iso-9001-lead-implementer-course/
- ISO 9001:2015 Internal Auditor Course - https://advisera.com/training/iso-9001-internal-auditor-course/