Question $1$

The information of demand for subassembly product $A$ is made of two units of $B$

and one unit of $C.$ Each $C$ is composed of three units of $B,$ one unit of $D,$ and four

units of E$.$ Each $B$ is made of three units of $D$ and one unit of $F.$ Each $D$ is made of

one unit of E$.$ Items C has a lead time of one week; Items A$,$ B$,$ E$,$ and F have two

week lead times; and Item D has a lead time of three weeks. Lot for lot lot sizing

is used for items C$,$ E and F; lot for size $20,40$ and $160$ are used for items A$,$ B and

$D,$ respectively. Items A$,$ B$,$ D$,$ and $E$ have on hand $($beginning$)$ inventories of $5,10,$

$100$ and $100$ respectively; all other items have zero beginning inventories. We are

schedule to received $10$ units of $A$ in Week $3,20$ units of $B$ in week $7,40$ units of $F$

in Week $5,$ and $60$ units of $E$ in Week $2$; there are no other schedule receipts.

There is $20$ units of A are required in Week $10.$

Construct a product structure tree and identify all levels.

Construct a gross material requirement plan showing gross and requirement and order release and order receipt dates using the on hand inventory data.