Lean approaches are helpful for the development and maintenance of documentation compliant with ISO Management System Standards (MSS). These standards include ISO 9001, ISO 13485, ISO 14001, ISO 45001, and many others. You can also apply these tactics to the management systems to support 21 CFR 820 FDA regulation. The article offers an effective technique to optimize management system documentation structure. It will be helpful to those organizations that struggle with over-documented systems and those searching for ideas to simplify their ISO management system documentation.