Again, that goes to, I think, the use of limited resources. There aren't unlimited inspectors, and there isn't unlimited time, so you want to make sure that you're targeting a part of your inspection population to higher-risk areas. That is why you want to make sure that in a risk-based approach, you look at the higher-risk areas. Then you do random inspections. You don't always want the same people to know you're coming to see them, so you do need to have random inspections. You also add to that reactive inspections based on findings from, perhaps, safety management system audits or complaints.
When you put those three types of inspections together, that allows you to have a real, comprehensive view of what's going on in the industry. However, it fundamentally starts with good risk assessments that allow you to target your limited resources to the bigger, most important areas.