## 4 Results
### Statutory Control and Monitoring Mechanism of the External Stone Cladding System in Hong Kong
Inspection schedule and a checklist for this specific work-trade should also be devised to facilitate the site inspection process and ensure the checking on all essential items regularly and systematically. It needs to be updated to suit the actual site works and operations, as well as changes in site conditions. They suggested that the checklist should include those items in Table 5.  
Figure 8: Factors that are crucial to the successful installation of the external stone cladding system and minimize its defects in HK (\(n=53\)). \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c c c} \hline \hline  & & \multicolumn{6}{c}{**Design Team**} & \multicolumn{6}{c}{**Construction Team**} & \multicolumn{2}{c}{**Mann-Whitney**} \\ \cline{3-14}
**Item** & **Factors** & \multicolumn{3}{c}{**Descriptive Statistics**} & \multicolumn{3}{c}{**Shapiro-Wilk**} & \multicolumn{3}{c}{**Descriptive Statistics**} & \multicolumn{3}{c}{**Shapiro-Wilk**} & \multicolumn{3}{c}{**U Test**} \\ \cline{3-14}  & & **N** & **Mean** & **SD** & **SK** & **W** & **Sig.** & **N** & **Mean** & **SD** & **SK** & **W** & **Sig.** & **U** & **Sig.** \\ \hline
1 & Material \& technical specifications & 33 & 4.09 & 0.631 & \(-\)0.066 & 0.780 & 0.000 & 17 & 3.53 & 0.514 & \(-\)0.310 & 0.642 & 0.000 & 155.0 & 0.004 \\ \hline
2 & OA provided by the supplier/manufacturer/subcontractor & 33 & 3.82 & 0.635 & \(-\)0.618 & 0.768 & 0.000 & 17 & 3.71 & 0.588 & 0.109 & 0.750 & 0.000 & 248.5 & 0.440 \\ \hline
3 & Shop drawings & 33 & 3.52 & 0.566 & \(-\)0.614 & 0.703 & 0.000 & 17 & 3.76 & 0.562 & \(-\)0.083 & 0.733 & 0.000 & 337.0 & 0.182 \\ \hline
4 & Structural calculation & 33 & 3.12 & 0.740 & 0.293 & 0.840 & 0.000 & 17 & 3.12 & 0.485 & 0.399 & 0.659 & 0.000 & 282.0 & 0.972 \\ \hline
5 & Use of suitable type and kind of stone & 33 & 3.76 & 0.435 & \(-\)1.260 & 0.534 & 0.000 & 17 & 3.82 & 0.636 & 0.143 & 0.785 & 0.001 & 291.0 & 0.788 \\ \hline
6 & Selection of raw stone materials & 33 & 3.61 & 0.864 & \(-\)0.349 & 0.862 & 0.000 & 17 & 3.82 & 0.728 & 0.290 & 0.809 & 0.003 & 312.0 & 0.487 \\ \hline
7 & Use of appropriate anchorage system & 33 & 3.76 & 0.614 & \(-\)0.684 & 0.753 & 0.000 & 17 & 3.76 & 0.664 & 0.291 & 0.792 & 0.002 & 274.0 & 0.877 \\ \hline
8 & Monitoring \& inspection during production & 33 & 4.03 & 0.637 & \(-\)0.023 & 0.784 & 0.000 & 17 & 4.29 & 0.686 & \(-\)0.456 & 0.789 & 0.001 & 340.5 & 0.169 \\ \hline
9 & Factory pre-lay and numbering & 33 & 2.48 & 0.619 & 0.061 & 0.785 & 0.000 & 17 & 2.71 & 0.59 & 0.109 & 0.75 & 0.000 & 331.5 & 0.240 \\ \hline
10 & Protection for delivery of stone panels & 33 & 3.12 & 0.650 & \(-\)0.118 & 0.788 & 0.000 & 17 & 3.88 & 0.78 & 0.219 & 0.812 & 0.003 & 418.5 & 0.002 \\ \hline
11 & On-site mock-up & 33 & 2.91 & 0.522 & \(-\)0.139 & 0.697 & 0.000 & 17 & 2.76 & 0.75 & 1.433 & 0.709 & 0.000 & 231.0 & 0.216 \\ \hline
12 & Skilled installer & 33 & 4.00 & 0.500 & 0.000 & 0.675 & 0.000 & 17 & 4.18 & 0.73 & \(-\)0.290 & 0.809 & 0.003 & 324.0 & 0.288 \\ \hline
13 & Specific tools for anchorage slot formation & 33 & 3.27 & 0.626 & 0.551 & 0.771 & 0.000 & 17 & 3.41 & 0.51 & 0.394 & 0.632 & 0.000 & 317.5 & 0.375 \\ \hline
14 & Qualified site supervision by TCPs & 33 & 4.06 & 0.496 & 0.153 & 0.67 & 0.000 & 17 & 3.88 & 0.49 & \(-\)0.399 & 0.659 & 0.000 & 236.5 & 0.228 \\ \hline
15 & Open-up inspection of completed stone cladding & 33 & 2.15 & 0.755 & 0.200 & 0.848 & 0.000 & 17 & 2.00 & 0.79 & 0.000 & 0.817 & 0.003 & 254.0 & 0.558 \\ \hline
16 & Use of appropriate water repellant & 33 & 2.97 & 0.810 & \(-\)0.696 & 0.827 & 0.000 & 17 & 2.94 & 0.56 & \(-\)0.051 & 0.732 & 0.000 & 263.5 & 0.692 \\ \hline
17 & Periodic site inspection by Expert & 33 & 2.15 & 0.795 & 0.905 & 0.777 & 0.000 & 17 & 2.24 & 0.83 & 0.243 & 0.877 & 0.029 & 303.0 & 0.605 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Factors to ensure the quality in the installation stage (Comparison between ’Design Team’ and ’Construction Team’, \(n=50\)).