I completely agree with Randy,
Also,
How about looking at the records of checks, tests and inspections done on the product. If the product (or intermediate product) did not match the criteria, what was done - was there a re-work? Look at your procedure of Control of non-conforming products. What happens in the event of a non-conforming product?
IMHO considering your promise of reducing rework, it will be better to have a system of collecting and analyzing such data periodically and look at the trend. Then further deciding on the action for progress in desired direction. Looking for such data / evidence in internal audit may not be very effective. You have talked about reducing rework, not eliminating, yet.
Also,
How about looking at the records of checks, tests and inspections done on the product. If the product (or intermediate product) did not match the criteria, what was done - was there a re-work? Look at your procedure of Control of non-conforming products. What happens in the event of a non-conforming product?
IMHO considering your promise of reducing rework, it will be better to have a system of collecting and analyzing such data periodically and look at the trend. Then further deciding on the action for progress in desired direction. Looking for such data / evidence in internal audit may not be very effective. You have talked about reducing rework, not eliminating, yet.