Very interesting question. To be successful in the project, culture organization has a huge impact on your success rate. Your organization structure can help or hurt project success, it is easier to change organization structure than culture organization for a large organization. If employees are not following project management process set by head of the organization or project manager, more likely project would fail to accomplish goals.
Composite organization involves all or combination of the functional, matrix, and projectized types of organizations. For instance, same project is assigned to different groups the result to overlapping of resources. It completely depends on project because some project works best on functional organization and other on matrix organization and so on.
http://www.techrepublic.com/article/organizational-culture-and-structure-influence-project -management-more-than-you-realize/