a) Consider a manufacturing process that produced chemically - coated wear resistance steel plates from salvaged materials . identify the input , output ,controllable and uncontrollable variables of the system by construction a standard manufacturing framework.
b) As a manufacturing engineer in the steel plate plant above , you are faced with problems of common cause of variation and special cause of varaiation. draw a free hand sketch of the a forementioned variations.recommend three possible causes of each variation . justify why you would choose these causes.