Problem -
Electro Fans has just received an order for one thousand 20-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 lead times, on-hand inventory, and scheduled receipts.
a) Construct a product structure.
b) Construct a time-phased product structure.
c) Prepare a net material requirements plan.
Data Table for Problem
|
COMPONENT
|
LEAD TIME
|
ON-HAND INVENTORY
|
LOT SIZE*
|
SCHEDULED RECEIPT
|
|
20" Fan
|
1
|
100
|
-
|
|
|
Housing
|
1
|
100
|
-
|
|
|
Frame
|
2
|
-
|
-
|
|
|
Supports (2)
|
1
|
50
|
100
|
|
|
Handle
|
1
|
400
|
500
|
|
|
Grills (2)
|
2
|
200
|
500
|
|
|
Fan Assembly
|
3
|
150
|
-
|
|
|
Hub
|
1
|
-
|
-
|
|
|
Blades (5)
|
2
|
-
|
100
|
|
|
Electrical Unit
|
1
|
-
|
-
|
|
|
Motor
|
1
|
-
|
-
|
|
|
Switch
|
1
|
20
|
12
|
|
|
Knob
|
1
|
-
|
25
|
200 knobs in week 2
|
*Lot-for-lot unless otherwise noted.