For example, Boeing has maintained longstanding relationships since 1974 with Japanese suppliers including Mitsubishi Heavy Industries and Kawasaki Heavy Industries by which these companies have had increasing involvement on successive Boeing jet programs, a process which has helped Boeing achieve almost total dominance of the Japanese market for commercial jets. Outsourcing was extended on the 787 to the extent that Boeing's own involvement was reduced to little more than project management, design, assembly, and test operation, outsourcing most of the actual manufacturing all around the world. Boeing has since stated that it "outsourced too much" and that future airplane projects will depend far more on its own engineering and production personnel.