Collaboration and digitization in work and production process have been of scientific interest in the research field of vocational education and training for decades. So far, there is a lack of empirical evidence on the extent to which the performance of collaborative problem-solving can outperform individual problem-solving. An appropriate instrument for measuring collaborative performance appropriately has been lacking to this point: It is challenging to (1) collect data on interaction in collaboration in a standardized way and (2) to assign the individual performances to the group performance. In a web-based office simulation, this study examined the two-dimensional construct of collaborative problem-solving ability, which consists of cognitive and social components, and explored the effectiveness of collaboration.