Why is the development cycle development cost out of control under the traditional product development mode?

Unable to grasp and control the performance of new products.

Product development is a series of processes from proofing, mold opening, evaluation and verification, trial production to mass production. For example, the development of computer shell products and furniture products will have a lot of work to be completed before entering the market, such as appearance design, raw material selection, process selection, evaluation and verification, design verification, production verification, reliability testing, RoHS data preparation and so on. This is product development.