The demand for subassembly S is units in week $7.$ Each unit of S requires unit of T and unit of U$.$ Each unit of T requires unit of$$ V$,$ unit of$$ W$,$ and unit of X$.$ Finally, each unit of U requires unit of Y and units of Z$.$ One firm manufactures all items. It takes $2$ weeks to make$$ S$,$ week to make$$ T$,2$ weeks to make$$ U$,$ week to make$$ V$,$ weeks to make$$ W$,$ week to make$$ X$,2$ weeks to make$$ Y$,$ and week to make Z$.$

LOADING... Click the icon to view the product structure and the$$ time$-$phased product structure.

LOADING... Click the icon to view the$$ on$-$hand inventory.

Part $2$

Suppose that in addition to units of$$ S$,$ there is also a demand for units of$$ U$,$ which is a component of S$.$ The units of U are needed for maintenance purposes. These units are needed in week $6.$ Additionally, a new order has been received for units of S due in week $8.$ Modify the net material requirements plan to reflect these changes.

Part $3$

Construct a new net material requirements plan $($enter your responses as whole numbers$).$