In certain situations, additional batches should be included in the on-going stability program. For example, an on-going stability study should be conducted after any significant change or significant deviation to the process or package. Any reprocessing operation should also be considered for inclusion, unless it has been validated and performed stability test. Before the permanent changes such as the production process and primary packaging change which may have impact on product stability, the accelerated stability study should be tested prior to change to determine the impact to product stability, the long-term stability testing should be done for the first three batches after the change implementation.