Raw material quality control and site quality control

Although we have talked about these two positions in detail before, what we need to ask you now is how to make the personnel of the two positions give full play to their abilities and grasp the quality of raw materials and finished products. In the usual work, can you repeat the details that the two positions need to pay attention to? thank you-- the two positions need to master each other's knowledge and information about each other's positions, so that they can consider the problem more comprehensively! Agree with the upstairs point of view