It is common in sampling plans to use a single sample to inspect multiple attributes. As you stated a sample size of 315 could be inspected with an accept number of 0 for critical defects and 10 for less critical defects.
The sampling statistics would be:
Sample Size Acc Re AQL LTPD
315 0 1 0.02% 0.73%
315 10 11 1.97% 4.85%
These are the actual values compared to the Z1.4 tabled values.
Keep in mind you are inspecting more units for minor defects, but if all defect types can be inspected simultaneously it might not be an issue.
