I always run a per incident charge for defects (outside a 6 month approval window) and requote for features. Per incident charge is relatively high to dissuade

I always run a per incident charge for defects (outside a 6 month approval window) and requote for features. Per incident charge is relatively high to dissuade people from filing lots of trivial things and actually QA it in the approval window. I have run projects where there are no defects reported however so YMMV.