shouban means that all products that have just been developed or planned need to be made of hand boards. Hand boards are the first step to verify the feasibility of products, and the most direct and useful method to find out the shortcomings, deficiencies and disadvantages of planned products, so as to make targeted improvements to the shortcomings until the deficiencies cannot be found from a single hand board sample.
at this point, it is generally necessary to carry out trial production in small batches to find out the deficiencies in the batches and improve them. Generally, the planned products can't be perfect, or even can't be used. Once the direct production has defects, it will be completely invalid, which greatly wastes manpower, material resources and time; However, the general situation of hand board is a small number of samples, with short manufacturing cycle and less manpower and material resources. The lack of product planning can be quickly found out and improved, which provides sufficient basis for product finalization and mass production.