Airwaves Inc. has received an order for $100020-$inch fans due week $7.$ Each fan consists of a housing

assembly, two grills, a fan assembly, and an electrical unit. The housing assembly consists of a frame,

two supports, and a handle. The fan assembly consists of a hub and five blades. The electrical unit

consists of a motor, a switch, and a knob. The following table gives the lead times, and on$-$hand

inventory.

Components Lead Time $($in weeks$)$

On$-$Hand Inventory

$20"$ Fan $($A$)$ Housing $($B$)$

Frame $($C$)$

Supports $($D$)$

Handle $($E$)$

Grills $($F$)$

Fan Assembly $($G$)$

Hub $($H$)$

Electrical Unit $($J$)$

Motor $($K$)$

Switch $($L$)$

Knob $($M$)$

$20$

a$.$ Draw the product structure. $($Use the letters to indicate components$)$ and determine the

number of units of each item required to satisfy the demand for the order of $1000$ fans. In other

words "Explode" the requirements. $(10$ points$)$

b$.$ Draw the time$-$phased product structure. $(5$ points$)$

c$.$ Build the gross requirements plan. $($Use spread sheet$)(10$ points$)$

d$.$ Redraw the product structure and explode the "net requirements". $(5$ points$)$

e$.$ Fill out the net requirements. $($Use spread sheet$).(10$ points$)$

GROSS REQUIREMENTS PLAN

Item

tem