# Assessing and Priorities Delay Factors of Prefabricated Concrete Building Projects in China
## 5 Results and Analysis
### DEMATEL Analysis
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Dimension** & \(\boldsymbol{r_{\text{i}}}\) & \(\boldsymbol{c_{\text{i}}}\) & \(\boldsymbol{r_{\text{i}}+c_{\text{i}}}\) & \(\boldsymbol{r_{\text{i}}-c_{\text{i}}}\) & **Factor** & \(\boldsymbol{r_{\text{i}}}\) & \(\boldsymbol{c_{\text{i}}}\) & \(\boldsymbol{r_{\text{i}}+c_{\text{i}}}\) & \(\boldsymbol{r_{\text{i}}-c_{\text{i}}}\) \\ \hline \multirow{3}{*}{D1} & \multirow{3}{*}{0.7791} & \multirow{3}{*}{0.0000} & \multirow{3}{*}{0.7791} & \multirow{3}{*}{0.7791} & \multirow{3}{*}{0.7791} & F11 & 0.5324 & 0.1099 & 0.6423 & 0.4225 \\  & & & & & F12 & 0.5060 & 0.2507 & 0.7566 & 0.2553 \\  & & & & & F13 & 0.8086 & 0.2873 & 1.0959 & 0.5214 \\ \hline \multirow{3}{*}{D2} & \multirow{3}{*}{1.0902} & \multirow{3}{*}{0.4306} & \multirow{3}{*}{1.5208} & \multirow{3}{*}{0.6596} & F21 & 1.5553 & 0.0000 & 1.5553 & 1.5553 \\  & & & & & F22 & 0.3648 & 1.5282 & 1.8930 & \(-\)1.1634 \\  & & & & & F23 & 0.8845 & 0.1641 & 1.0486 & 0.7205 \\ \hline \multirow{3}{*}{D3} & \multirow{3}{*}{0.3845} & \multirow{3}{*}{1.1627} & \multirow{3}{*}{1.5473} & \multirow{3}{*}{\(-\)0.7782} & F31 & 0.0928 & 1.5063 & 1.5990 & \(-\)1.4135 \\  & & & & & F32 & 0.4174 & 0.5552 & 0.9726 & \(-\)0.1378 \\ \hline \multirow{3}{*}{D4} & \multirow{3}{*}{0.4053} & \multirow{3}{*}{0.8943} & \multirow{3}{*}{1.2996} & \multirow{3}{*}{\(-\)0.4890} & F41 & 0.4761 & 0.0876 & 0.5637 & 0.3885 \\  & & & & F42 & 0.2005 & 1.5358 & 1.7363 & \(-\)1.3353 \\ \hline \multirow{3}{*}{D5} & \multirow{3}{*}{0.3845} & \multirow{3}{*}{0.9712} & \multirow{3}{*}{1.3558} & \multirow{3}{*}{\(-\)0.5867} & F51 & 0.3079 & 0.3286 & 0.6365 & \(-\)0.0207 \\  & & & & & F52 & 0.1826 & 0.0292 & 0.2118 & 0.1533 \\ \hline \multirow{3}{*}{D6} & \multirow{3}{*}{1.4995} & \multirow{3}{*}{1.2988} & \multirow{3}{*}{2.7983} & \multirow{3}{*}{0.2007} & F61 & 1.3253 & 0.3920 & 1.7173 & 0.9333 \\  & & & & & F62 & 0.5303 & 0.6578 & 1.1881 & \(-\)0.1276 \\  & & & & & F63 & 0.8151 & 0.6853 & 1.5005 & 0.1298 \\  & & & & & F64 & 1.2819 & 0.3460 & 1.6279 & 0.9359 \\  & & & & & F65 & 1.4101 & 0.0699 & 1.4800 & 1.3402 \\  & & & & & F66 & 0.3298 & 1.4486 & 1.7784 & \(-\)1.1188 \\  & & & & & F67 & 0.1752 & 2.4292 & 2.6043 & \(-\)2.2540 \\  & & & & & F68 & 0.1610 & 0.1174 & 0.2785 & 0.0436 \\  & & & & & & F69 & 0.2460 & 0.8122 & 1.0583 & \(-\)0.5662 \\ \hline \multirow{3}{*}{D7} & \multirow{3}{*}{0.2146} & \multirow{3}{*}{0.0000} & \multirow{3}{*}{0.2146} & \multirow{3}{*}{0.2146} & F71 & 0.1811 & 0.0000 & 0.1811 & 0.1811 \\  & & & & & F72 & 0.3085 & 0.0000 & 0.3085 & 0.3085 \\ \cline{1-1}  & & & & & F73 & 0.2481 & 0.0000 & 0.2481 & 0.2481 \\ \hline \end{tabular}
\end{table} 
Table 5: Sum of influences given to and received from other factors. Figure 2: Influential network-relations map for dimensions. suggests that among the dimensions that affect the project progress in prefabricated building projects, 'construction techniques' (D1) exerted the largest influence on the other six dimensions and'resources' (D3) received the largest influence from the other six dimensions. D1, D2, D6 and D7 are considered cause dimensions, but it is not easy to avoid D1 and D7 at this stage. Strategies can be mainly focused on 'workforce' (D2) and 'contractors' (D6) to eliminate their impacts on D3, D4 and D5 for improving the schedule performance. In terms of the dispatched-influence value in the seventh column of Table 5, the delay factors can be ranked in the following order: F21, F65, F61, F64, F23, F63, F13, F11, F62, F12, F41, F32, F22, F66, F72, F51, F73, F69, F42, F52, F71, F67, F68, and F31. Factor 21, 'inadequate worker experience', has the most significant impact on the other factors. The results also reveal that 'information gaps among companies' (F65), 'improper construction planning and schedule design' (F61), 'lack of communication among participants' (F64), and 'insufficient proficiency for workers' (F23) are more likely to affect the other factors. For example, on-site assembly as a labour-intensive procedure must currently be completed by construction workers.