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In this paper, a good example on integration of CAE (Computer Aided Engineering) and RLD (Road Load Data) analysis is introduced. It works well in the process of investigating the hinge crack problem of a vehicle hood and leads to schemes which are suitable to the root cause found. As the byproducts, a design target is confirmed and a procedure of problem investigating is proposed, as shown in Flowchart 1. Flowchart 1 Problem Investigating Procedure In order to ascertain the reason of the crack, multiple methods have been used, such as material verification, manufacturing examination, typical load case evaluation by CAE, and RLD analysis etc. Eventually, the reason is proved to be structural resonance by the common thread of both CAE and RLD. During the progress of problem solving, four main steps are involved and mentioned in the following sections.