Rejection During Operation

Hi ,

I have a component which has to go thorough variuos process an is mapped as operation 5,10,20,40,60.

During operation 20 we hav MIC on basis of which system evaluats whether the componens is good or rejected. However if a component is rejected in operation 20 it doesnot reflect as gettin one component less in MD04.for eg if my order qty of component A is of 4 and one "A" get rejected in operation 20 MD04 still shows 4 components to be produced from production order. Its only when i do GR of the other components it says 3 components avlb.Also its gives wrong information when i am runnin planning engine. Please Help do i need to do any config setting