3.4. Application criteria
The most obvious application of the consistency approach is in the routine release of product. However, this approach could also be applicable to stability testing under certain circumstances. For example, the approach could be applied during stability studies to confirm consistency with the product profile. For a specified number of lots this might be complemented by re-assessment of stability by in vivo testing. It should nevertheless be clear that if such an approach were to become current practice the system should be rethought for certain kinds of products.