The Mitsubishi Electric Group established the Four Basic Quality Assurance Principles that reflect the spirit of quality as the top priority identified in Memorandum of Quality issued by the president in 1958. However, in 2021, many improper quality control practices were made public. Therefore, the Basic Quality Assurance Principles were revised as below in November 2023 incorporating feedback from employees.

Under the Basic Philosophy on Quality, the Group will realize a system and a workplace that eliminates incentives for improper quality control practices.