Operations management 12th stevenson chapter 12 solutions

4.

a.
Master
Schedule

E

Week

Beg.
Inv.

1

2

3

4

5

Quantity
LT = 2 wks.

6
80

Beg.
Inv.

1

2

3

4

5

Gross requirements

6
80

Scheduled receipts
Projected on hand
Net requirements

80

Planned-order receipts

80

Planned-order releases
B(2)

LT = 2 wks.

80
Beg.
Inv.

1

2

3

Gross requirements

4

5

6

20

20

5

6

160

Scheduled receipts

Projected on hand

60

60

60

60

60

Net requirements

100

Planned-order receipts

120

Planned-order releases

J(4) & J(3) LT = 1 wk.

120

Beg.
Inv.

1

Gross requirements

2
480

Scheduled receipts
Projected on hand

3

20

20

20

4
240

30

30

30

50

80

50

Net requirements

460

160

Planned-order receipts

480

180

Planned-order releases

480

180

50


4.

b.
Master
Schedule

E

Week

Beg.
Inv.

1

2

3

4

5

Quantity
LT = 2 wks.

6
70

Beg.
Inv.

1

2

3

4

5

Gross requirements

6
70

Scheduled receipts
Projected on hand
Net requirements

70

Planned-order receipts

70

Planned-order releases
B(2)

LT = 2 wks.

70
Beg.
Inv.

1

2

3

Gross requirements

4

5

6

40

40

5

6

140

Scheduled receipts
Projected on hand

60

60

60

60

Net requirements

80

Planned-order receipts

120

Planned-order releases

J(4) & J(3) LT = 1 wk.

120

Beg.
Inv.

1

Gross requirements

2

3

480

Scheduled receipts
Projected on hand

60

20

20

20

4
210

30

30

30

50

80

80

Net requirements

460

130

Planned-order receipts

480

180

Planned-order releases

480

180

There will be an additional 20 units of B and 30 units of J.

80


5. a. Product Structure Tree
P
K
3G

L
4H

W

2M

2N

Beg.
Inv.

1

3Z

c.
Weeks

6

7

100

100

6

7

100

100

Net requirements

100

100

Planned-order receipts

100

100

Master
Schedule
d.

P

2

3

4

5

Quantity
LT = 1 wk.

Beg.

Inv.

1

2

3

4

5

Gross requirements
Scheduled receipts
Projected on hand

Planned-order releases
K

LT = 2 wk.

Beg.
Inv.

1

2

3

4

Gross requirements
Scheduled receipts

10

Projected on hand

10

100

100

5

6

100

100
30

10

10

Net requirements

90

70

Planned-order receipts

90

70

5

6

Planned-order releases
G(3)

LT = 1 wk.

Beg.
Inv.

1

2

Gross requirements

90

70

3

4

270

210

Scheduled receipts
Projected on hand

40

40

40

40

Net requirements

230

210

Planned-order receipts

253

231

Planned-order releases

253

231

7

7


H(4)

LT = 1 wk.

Beg.
Inv.

1

2

3

4

360

280

200

40

Net requirements

160

240

Planned-order receipts

200

240

Gross requirements
Scheduled receipts
Projected on hand

Planned-order releases

200

200

200

200

240

5

6

7