This is really pratucal cource. we have made aircraft on Monday and Tuesdad. The case study shows how to improve the process of making aircraft by using six sigma. we are divided to two groups, and find out the improved process to make it. Compare to orginal one, there are dramatical improvemen in the customer satifaction, the cost has saved a lot compared pevious process. one thing is very improtant is motivation to run the project. the reward system makes better performance. Thanks for Graeme. I have learnd how to improve the process and quality of product.