As part of the project's methodology, a laboratory experiment aims to analyse professionals working on planning decision-making using 4D models and a collaboration device.
Based on the "Maison de l'Innovation" scenario, two tasks have been prepared and tested with two groups of 8 professionals late in 2017.
Then in May/June 2018, 16 professionals, in 4 groups of 4 users have taken part in the experimental session both in LIST (Luxembourg) and MAP-CRAI (France) premises.
Table 1: Groups and location of the experiments
|Number of professionals||4||4||4||4|
Each group had to perform two tasks related to project planning, in a collaborative manner. They had to use the Shariiing software, provided by Immersion, in order to review, use and annotate the project's documents, incl. 4D models. The whole experiment sessions have been recorded by 4 cameras plus the recording of the horizontal touch-based display.They will be further analysed using encoding software for statistical analyses of interactions. Additional interviews and questionnaires enabled to get the feedback of the experimenters regarding utility and usability of the proposed system.
Our initial analyses demonstrate homogeneous results with regards to the time needed for performing the first task (see table) amongst the four groups. However significant differences are observed in time required to perform Task 2, especially for the groups 3 and 4, which only needed 28 and 11 minutes to achieve the task. A hypothesis to explain this, is that group 4 comprised an engineer expert in construction site planning, who probably highly influenced the decision of the group compared to the others. Further analyses will definitely try to better understand it.
Table 2: Experiments summary
|Task 1||Task 2|
|G1 (Time in min.)||68||60|
|G2 (Time in min.)||58||60|
|G3 (Time in min.)||63||28|
|G4 (Time in min.)||75||11|
As per the satisfaction of the users, we noted a high interest in the approach. Indeed, collaboratively reviewing 4D-based construction planning makes sense, and is considered as useful by the professionals. Some drawbacks related to the interaction technology have been detected, and other improvements related to the whole BIM Management workflow have been defined. These will be tackled in the next steps of the project progress.