When I joined the aviation safety regulator I was introduced to the concept of systems-based auditing (SBA). Before this I had been carrying out aerodrome inspections and I thought becoming an Aerodrome Inspector for the government was going to be more of the same. How wrong I was! Even after four years, my concept of systems-based auditing is still evolving. I coming to discover, and it seems everything I read will attest, that most things in life tend to be more complex than we initially think - SBA is no different.