AHP

< Previous | Next | Contents >

Tired of ads? Read this AHP tutorial off-line. Click here to purchase the e-book of this AHP tutorial

Decision Based on Weighted Criteria

Having a fair decision table as shown in Table 4 , now come out another question. What happen if the factors have different importance weight? Of course the weight of importance is subjective value, but we would like to know how the result will change if we put different weight on each factor.

Just for example we judge that factor B and C are 2 times more important than factor D while factor A is 3 times more important than factor B. We normalized the subjective judgment of importance level and we obtain weight of importance as shown in Table below

Table 5: Weight of Importance

Factor A

Factor B

Factor C

Factor D

Sum

Importance Level

6

2

2

1

11

Importance Weight

54.5%

18.2%

18.2%

9.1%

100.0%

Having the normalized weight of each factor, now we can multiply the converted score of table 4 with the normalized weight and get the new weighted score as show in table 6.

Table 6: Weighted scores

Criteria | Alternatives

Weight

Choice X

Choice Y

Choice Z

Factor A

54.5%

0.109

0.436

0.545

Factor B

18.2%

0.035

0.127

0.090

Factor C

18.2%

0.000

0.091

0.136

Factor D

9.1%

0.036

0.068

0.036

Sum

100.0%

0.180

0.722

0.808

Normalized Score

10.5%

42.2%

47.2%

Comparing the normalized score of Table 4 and Table 6 we can observed some shift on the choice. In Table 4, choice Y is preferable than Z. However, after we include the weight of importance of each factor, we conclude that choice Z is the most preferable alternative.

We have learned simple method to quantify our subjective opinion for our decision making. In the next section you will learn another powerful method called Analytic Hierarchy Process (AHP).

Click here to purchase the PDF copy of this AHP tutorial

Do you have question regarding this AHP tutorial? Ask your question here

< Previous | Next | Contents >

Comments for this tutorial

These tutorial is copyrighted .

Preferable reference for this tutorial is

Teknomo, Kardi. (2006) Analytic Hierarchy Process (AHP) Tutorial .
http://people.revoledu.com/kardi/tutorial/AHP/