You may be well aware of the interfacing challenges between two subcontractors interfacing their works. Whether they disagree, or resist to collaborate and act with passive-resistance, it's a distraction a waste of your time and a headache at best.
What do we do?
In understanding these issues, we make a structured approach which prevents the issues. It also removes the hidden costs of revisits.
It requires extra effort from our team, but at least you'll get from what you ultimately want - the product delivered and no hassle or costs on the way - the subtle but impactful advantages of proactive project managers, and cooperative and collaborative site teams.