In a recent discussion, the use of internal audits to identify areas for improvement was a topic of debate. Is this what internal audits are required for? To identify improvements? From the perspective of 6 Sigma improvements, the typical "Green Belt" qualification is far more extensive than the usual internal auditor and as for 6 Sigma "Black Belts", their qualifications are way in excess of a so called "Lead Auditor". So, can someone set me straight? What kinds of improvements are internal auditors supposed to be looking for if they haven't been trained in recognized techniques, somewhat like the Sigma Belts have?