ISO 9001 version 2015 is a quality management system according to international standards. The key concept of ISO 9001 is the establishment of a management system for quality assurance. which is a system that ensures that various processes It is regulated and can be audited. through a system that specifies procedures and methods of working To ensure that personnel in the organization know their responsibilities and procedures. in practice which requires training to provide knowledge and skills to work information is recorded Including checking whether the operation is as specified in the system or not. And there are corrections to errors as well as ways to prevent the same errors. This is an important thing that Deline Group adheres to in their work.