Dissolution test for solid dosage forms: I don’t understand how to calculate the acceptance criteria. Could you give an example? (Copy)

If Q has been set as 75% of dissolved active substance, the acceptance criteria would be as follows:

6 dosage units are tested:

- Acceptance criterion at level S₁: each of the 6 dosage units tested is not less than 80%.

If the result does not conform, a further 6 dosage units are tested:

- Acceptance criterion at level S₂: the average of the 12 dosage units tested in levels S₁ and S₂ is equal to or greater than 75%, and no dosage unit is less than 60%.

If the result still does not conform, a further 12 dosage units are tested:

- Acceptance criterion at level S₃: the average of the 24 dosage units tested in levels S₁, S₂ and S₃ is equal to or greater than 75%, not more than 2 dosage units are less than 60%, and no dosage unit is less than 50%.

If the result still does not conform the test would be considered as failed.