Abstract
A definition of system architecture by systems engineering approach is an approach that clarify a system of interest, define functions that a system of interest should include, and logically segregate system elements to clarify their relationships. When using this approach in a project to improve the productivity of chemical company, it is necessary to clarify how program management needs to be carried out. Therefore, in this study, we will define the system architecture and discuss the relationship with P2M program management, taking an intellectual integration project of a developed company as an example.