Common constraints in project management and how global firms cope with multicultural differences

“What are the most common constraints in project management and how global firms cope with it and how they handle multicultural differences?”
How “Being had to cope with the multinational outsourcing of vendors on the 787 program, during its initial start-up and how it dealt with the constraints of multicultural differences.”
On the references, at least six references/citations with of them being (see below), as well as two scholarly articles.
Gido, J. & Clements, J.P. (2015). Successful project management, (6th ed.). Thomson South-Western.