Why do different teams of designers and subcontractors link and share their models during the design process?
Linking models mean that people can work on the documents at the same time and with different versions. I'd imagine this makes it easier to collaborate. Perhaps though, there could be issues with ensuring everyone was working with the same version or saving and building off each other.
How do you think design coordination was done before we started using digital models?
I'm not sure! Perhaps tracing paper was popular and then you added your iteration over top. I also wonder how easily duplicates of plans could be made.
What strategies can design teams use to find and avoid clashes prior to the start of construction?
Regular meetings and good communication seem key in terms of establishing shared visions for the project and ensuring no clashes among the team in the design process.