Common assumption of many MADM is that all criteria
are maximal. This assumption is not met in the washing machines model.
Example: Washing machines 
Decision Matrix.
The criteria transformation involves only the minimal criteria.
The part of
criteria transformation is a change of their names.
2  electric
power consumption
kW per one washing cycle 
Saved
electric power
kW per one washing cycle 
( in comparison with the variant with highest electric power consumption)  
3  water
consumption
litres per one washing cycle 
Saved
water
litres per one washing cycle 
( in comparison with the variant with highest water consumption)  
5  Cost
price of washing machine
CZK 
Saved
cost price
CZK 
( in comparison with the most expensive variant) 
Appropriate columns of the decision matrix are than:
f2

f3

f5

0,89

39

39990

1,05

54

22990

1,1

59

19990

1,15

59

17990

1,05

52

21590

1,3

72

14490

0,94

41

27990

1,3

72

14390

1,2

59

16390

1,25

74

15990

STEP 1: In each column find the column maximum (marked in the above table):
STEP 2:Transforrm each element in each column. The transformed decision matrix A thereinafter:
1600

0,41

35

5

0

1000

0,25

20

5

17000

1000

0,2

15

5

20000

850

0,15

15

5

22000

1200

0,25

22

5

18400

500

0

2

5

25500

1200

0,36

33

5,5

12000

800

0

2

5

25600

500

0,1

15

3,5

23600

850

0,05

0

5

24000
