Changes shall always lead to an update of final status and thus an update of the theoretical verification.In the case that the theoretical verification of provided reliability data and analyses didn´t fullfill the required quality level, the Supplier is obliged to correct the analyses in accordance to BT comments to finalise the theoretical verification of data latest prior to the official start of test runs.In the case that the theoretical verification was not done according to BT request, this will make effective the LDs for technical acceptance delay in accordance with STC.During the trial run operation with specific reliability requirements: FC_A and FC_B during the specified trial runs shall be 0 FPMK.If during Test run period the reliability requirements are not fulfilled, the test runs will be repeated until the requirements are met.During the repeating trails, until the defined targets per fault class are achieved will be deployed the LDs for the acceptance delay in accordance with STC.The verification of reliability requirements for trains in service will start when the delivered vehicle fleet of specific call-offThe implementation of in-service verification shall take place on complete, finished Vehicles without any outstanding modifications