Abstract: An embodiment of the present invention relates to a method of manufacturing a vehicle body. The method includes coupling a frame assembly to a platform, wherein the platform is in a cambered and unloaded condition, and wherein the frame assembly has a degree of play at coupling points with the platform and securing the coupling points to eliminate the degree of play and thereby to provide substantially zero residual stress in the vehicle body in the cambered condition.

Abstract: A computer-implemented method for improving a lithographic process for imaging a portion of a design layout onto a substrate using a lithographic projection apparatus comprising an illumination source and projection optics, the method including computing a multi-variable cost function of a plurality of design variables that are characteristics of the lithographic process, at least some of the design variables being characteristics of the illumination source and the design layout, the computing of the multi-variable cost function accounting for lens heating effects; and reconfiguring the characteristics of the lithographic process by adjusting the design variables until a predefined termination condition is satisfied.