Count the number of line problems (including self-inspection staff issue) / mass of the door window-integrated vehicle number * 1000 / + censoring the line quality threshold problem interlude car * 1000
Number of online problems (including employee self-test problems) / comprehensive quality door number of over-the-door cars , 1000 , number of offline problems / final inspection quality door number of over-the-door cars x 1000
Number of on-line problems (including staff self inspection problems) / number of passing cars of integrated quality door * 1000 + number of off-line problems / number of passing cars of final inspection quality door * 1000