Ranking-Theory Methods for Solving Multicriteria Decision-Making Problems

Table 3

Decision matrix for selecting material for a sailing boat mast.

#	Material	Criteria
		Specific strength (MPa)	Specific modulus (GPa)	Corrosion resistance	Cost Category
		SS	SM	CR	CC
		1	2	3	4
1	AISI 1020	35.9	26.9	1	5
2	AISI 1040	51.3	26.9	1	5
3	ASTM A242 type 1	42.3	27.2	1	5
4	AISI 4130	194.9	27.2	4	3
5	AISI 316	25.6	25.1	4	3
6	AISI 416 heat treated	57.1	28.1	4	3
7	AISI 431 heat treated	71.4	28.1	4	3
8	AA 6061 T6	101.9	25.8	3	4
9	AA 2024 T6	141.9	26.1	3	4
10	AA 2014 T6	148.2	25.8	3	4
11	AA 7075 T6	180.4	25.9	3	4
12	Ti–6Al–4V	208.7	27.6	5	1
13	Epoxy–70% glass fabric	604.8	28.0	4	2
14	Epoxy–63% carbon fabric	416.2	66.5	4	1
15	Epoxy–62% aramid fabric	637.7	27.5	4	1

Source: [1]. Notes: CR scale: 1 = poor; 2 = fair; 3 = good; 4 = very good; 5 = excellent.
CC scale: 1 = very high; 2 = high; 3 = moderate; 4 = low; 5 = very low.