I am reminded of my experience working for a German medical equipment company. We have distributed shared service centres around the world. Policy, best-practices, etc are formulated in the head office. For some reason we have continual problems with colleagues from one South American region who never follow best-practices and cause a lot of additional work for other teams who have to clean-up after them. I believe this is exactly what we talk about when we discuss cultural issues. We also have problems with giving these colleagues additional training and mentorship because they prefer to start a lot later in the morning, so our working hour overlap is very minimal.