BOM Components

Hi, say a finish product requires a semi finished product which we manufacture in-house (requires a raw material to make) and a raw material. in this case we need 3 level bom required, bottom most will be raw, 2nd from bottom will be semi finished & raw mat and top most will be finished product. if we run mrp (mts with stock 0) it suppose to create 1 pr to procure 1 raw (for bottom most mat) and 1 palnned order to make semi finished mat + 1 pr to procure 2nd level bom, 1 planned order to make assemblying final / finish product.Am i correct?

if i procure the second level semi finish mat from out side, the bom suppose to be 2 level. when we run mrp, 1 pr to procure semi + raw mat (2nd level) and 1 planned order to make finish product. Pls advise whether my above assumption is correct?