Selection of Sustainable Building Material Using Multicriteria Decision-Making Model: A Case of Masonry Work in Lideta Subcity, Addis Ababa

Table 6

Comparison of alternatives on the bases of life cycle cost.

	A1	A2	A3	A4
A1	1	1/2	1/3	3/4
A2	2	1	3/8	1 1/5
A3	3 1/4	2 3/4	1	4 1/4
A4	1 1/3	5/6	1/4	1
Sum	7 3/5	5	2	7 1/5
	A1	A2	A3	A4	W	Ws	Eigen value (λ) = Ws.1/{W}	Rank
A1	0.131	0.099	0.161	0.102	12.33 (%)	0.497	4.029	4
A2	0.262	0.197	0.192	0.166	20.44 (%)	0.822	4.023	2
A3	0.428	0.539	0.524	0.592	52.09 (%)	2.126	4.082	1
A4	0.179	0.165	0.123	0.139	15.14 (%)	0.612	4.044	3
Sum	1.000	1.000	1.000	1.000	1.000
λmax = Average λ value		4.045
N		4.000
CI		0.015
RCI		0.900
CR		0.017