## Appendix A Most Used Commands by Each Designer \begin{table}
\begin{tabular}{l l c c} \hline \hline \multicolumn{1}{c}{**Command ID**} & \multicolumn{1}{c}{**Description**} & \multicolumn{1}{c}{\
\begin{tabular}{c} **Absolute** \\ **Frequency** \\ \end{tabular} } & \multicolumn{1}{c}{
\begin{tabular}{c} **Relative** \\ **Frequency** \\ \end{tabular} } \\ \hline ID\_OBJECT\_BEAM & Create a beam & 190 & 10.7\% \\ ID\_FILE\_SAVE\_TO\_MASTER & Save the active project to the central model again & 181 & 20.8\% \\ ID\_OBJECT\_CURVE\_LINE & Create a line & 132 & 28.2\% \\ ID\_FINISH\_SKETCH & Finish sketch & 125 & 35.2\% \\ ID\_EDIT\_MOVE & Move selected objects or their copies & 99 & 40.8\% \\ ID\_EDIT\_MOVE\_COPY & Move copies of selected objects & 87 & 45.6\% \\ ID\_OBJECT\_PROJECT\_CURVE & Create a straight line or an arc & 84 & 50.3\% \\ ID\_VIEW\_NEW\_SCHEDULE & Create a schedule & 69 & 54.2\% \\ ID\_OBJECT\_CURVE\_RECT & Create a rectangle & 52 & 57.1\% \\ ID\_TRUS\_WEB\_CURVE & Create a truss web & 44 & 59.6\% \\ ID\_OBJECT\_LEVEL & Create a level & 42 & 61.9\% \\ ID\_FINISH\_SWEEP & Finish sweep & 40 & 64.2\% \\ ID\_OBJECT\_FOOTING\_SLAB & Create a footing slab & 37 & 66.3\% \\ ID\_END\_INPLACE\_FAMILY & Finish the family & 34 & 68.2\% \\ ID\_REVIT\_FILE\_SAVE & Save the active project & 33 & 70.0\% \\ ID\_LOAD\_INT\_PROJECTPS & Load document into open projects & 33 & 71.9\% \\ ID\_OBJECT\_TRUS & Create a truss beam & 32 & 73.7\% \\ ID\_EDIT\_MIRROR & Mirror selected objects & 31 & 75.4\% \\ ID\_EDIT\_ROTATE & Rotate selected objects & 31 & 77.1\% \\ ID\_FINISH\_SKETCH\_PATH & Finish a sketch of sweep path & 29 & 78.8\% \\ ID\_SKETCH\_2D\_PATH & Create or edit the path through a sketch in a plane & 28 & 80.3\% \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Contributory commands most frequently used by the structural designer. * _[PERSON] et al. (2014)_ [PERSON]; [PERSON]; [PERSON] A framework for BIM-enabled life-cycle information management of construction project. _Int. J. Adv. Robot. Syst._**2014**, _11_, 1-13. [CrossRef]
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* _[PERSON] (2011)_ [PERSON] _Factors Influencing the Use of Building Information Modeling (BIM) within Leading Construction Firms in the United States of America_; Proquest, Umi Dissertation Publishing: Ann Arbor, MI, USA, 2011; ISBN 9781243709448. * [PERSON] (2011) [PERSON] Building Information Modeling (BIM): Trends, Benefits, Risks, and Challenges for the AEC Industry. _Leadersh. Manag. Eng._**2011**, _11_, 241-252. [CrossRef]
* _[PERSON] et al. (2017)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] Addressing Challenges to Building Information Modelling Implementation in Uk: Designers' Perspectives. In Proceedings of the 30 th Annual ARCOM Conference, Cambridge, UK, 4-6 September 2017; pp. 733-742.