Criterion

Importance

α

β

Γ

C1: Efficiency

10

4

5

3

C2: Engine size

3

2

4

2

C3: Ideal dead space

4

3

4

3

C4: Industrial popularity

2

2

5

3

C5: Maintenance

4

4

2

3

C6: Manufacturability

4

4

2

3

C7: Material cost

4

1

5

3

C8: Noise output

5

2

3

2

C9: Power density

8

5

3

2

C10: Sealabilty

7

2

5

3

Raw Score

28

38

27

Relative Rank

2

1

3