when q2 is ordered, we see that sales picked up dramatically,causing a stockout very quickly. then at the end of L, we received the the order of q2, at that point we wished we would have ordered much more,but it is too late. we again stockout quickly after receiving q2 because demand is still high. we remain out of stock through the next review, until the end of the next lead time this demonstrates that the protection period for the (T,OUL) process is Tl.Hence, when we set safety stock we must do it with respect to the entire protection period.