Assignment 3 Exercise 1

1
1) Amount recycled
Total amount
2) Overall recycling rate
Assignment 3 Exercise 1
2
3)
Assignment 3 Exercise 1
3
1) Remanufacturing rate and yield
2) Change in environmental impact
Assignment 3 Exercise 2
4
2) Change in environmental impact
Assignment 3 Exercise 2
5
3) Durability choice
6
1)
2)
3)
Assignment 3 Exercise 3
7
5
38
Imports of steel and cast products
Exports of iron steel products
Imports of raw steel double-count adjustment
6
Apparent supplyof iron steel
Steel mills and foundries
1
Fabrication losses
35
Steel productsto USmarkets
Old scrap supplied consumed
Old scrap generated
1
Old scrap stock change
Stock changeof steel products in use 37
6
Old scrap exports
52
Pig iron / directly reduced iron (DRI) consumed
3
Unrecovered old scrap
New scrap generation rate 3/22 of apparent
supply x1
Old scrap imports
Assignment 3 Exercise 4
8
EOLprompt recycling rate
Recycled share of supply
EOL recycling rate
5
38
Imports of steel and cast products
Exports of iron steel products
132
Imports of raw steel double-count adjustment
6
Apparent supplyof iron steel
105
Steel mills and foundries
1
113
76
80
76
Fabrication losses
35
Steel productsto USmarkets
Old scrap supplied consumed
Old scrap generated
113
1
Old scrap stock change
Stock changeof steel products in use 37
6
18
Old scrap exports
52
39
18
Pig iron / directly reduced iron (DRI) consumed
3
Unrecovered old scrap
New scrap generation rate 3/22 of apparent
supply x1
Old scrap imports
Assignment 3 Exercise 4
9

• Common mistakes
• Confuse number reuse/recycling cycles n with
  total number of lives/cycles n1
• Compare power tool remanufacturing scenarios
  with n1 and n3 to different baselines (n1
  to no reman with Eman1, n3 to no reman with
  Eman1.1)
• Stock increase of steel in use is added instead
  of subtracted