For a fert having two semi finished materials inturn having 2 raw materials each using planning without final assembly 50, the VP planned orders are converted when the materials are checked usually there is shortage of semi finished again when I tried to convert the planned orders for semifinished in the stock there is availability but in the prod order there are logs giving me the material shortage. Can anybody clearly explain keeping the materials and particularly the strategy 50 the problem was haunting me from 2 days.