We tell people to focus on the process, because focusing on the process doesn’t happen enough. Is it sometimes a person? Yes, but then it is no longer a process issue, it’s a people issue…and process improvement tools and techniques may not help…Sadly.
This becomes more an issue for HR and management. But often we find it IS the process, and not the people. I have seen people on the verge of being fired, and when we did a Process Walk, they discovered he was the hero in the process…cleaning up everyone else’s mess!
There isn’t one root cause for why people don’t follow processes. It could be as broad as cultural barriers, or lack of enforcement by management, unclear or outdated process issues, etc. Before we blame people, look at the process, because most organizations don’t have perfect processes!