This test case is based on the Commercial Aircraft Template 881C structure, weight distributions, and manufacturing complexities. All hardware objects are scaled to the weight of the Xiangfeng. No changes are made to the software objects of the template. This example uses production schedule dates and quantities of the Xiangfeng program. No attempt has been made to differentiate among the various models of the Xiangfeng nor has any attempt been made to simulate the mutilple production lots of the program. Therefore, this example should be viewed as an illustration of how the commercial aircraft template can be used to produce a rough cost estimate of a known aircraft program.