Cost Analysis of Precast and Cast-in-Place Concrete Construction for Selected Public Buildings in Ghana

Table 6

Agreement by professionals on the advantages of using precast concrete.

Number	Advantages	Quantity Surveyors	Architects	Civil Engineers	Sum of ranking ()	Means of ranking ()			Overall ranking
1	Low life cycle cost	1	2	1	4	1.33	−1.03	1.061	5
2	Reduction of on-site waste	1	1	1	3	1.00	−1.36	1.850	1
3	Speed of construction	1	1	1	3	1.00	−1.36	1.850	1
4	Quality	2	3	2	7	2.33	−0.03	0.001	13
5	Durability	2	2	3	7	2.33	−0.03	0.001	13
6	Dimensional accuracy	1	2	1	4	1.33	−1.03	1.061	5
7	Reduction of on-site labour	1	4	1	6	2.00	−0.36	0.130	12
8	Reduction of on-site activity, noise, and disturbance	3	3	2	8	2.67	0.31	0.096	10
9	Sandwich panels available for insulation	2	3	3	8	2.67	0.31	0.096	10
10	Minimal maintenance	3	3	3	9	3.00	0.64	0.410	8
11	Thermal inertia reduces lifetime energy costs	4	3	3	10	3.33	1.31	1.716	3
12	Large spans available from prestressing	3	3	3	9	3.00	0.64	0.410	8
13	Tight tolerances	4	5	2	11	3.67	1.31	1.716	3
14	Acoustic insulation	3	5	2	10	3.33	0.97	0.941	7