Perhaps the biggest challenge is creating something new, to do this
you need people who can think out of the box while keeping their feet
on the ground. It’s all too easy to come up with a good idea but a
great idea needs to be practical also. Not only must you produce a
finished item that serves the client well, it should be on budget and
conform to the visual design.
This requires experience, especially if working abroad when regulations often differ and build times may be limited.