A method for quality assurance of filtration processes includes inserting a filter element (24) into a filtration device (14b) in which filter elements (24) can be subjected to integrity tests. The method further includes associating the integrity information with each filter element (24) in a filter element database (16; 34) connected to a shared data network (12) and saving the number of failed integrity tests performed on each filter element (24) as integrity information associated with that filter element. The saved tolerance setting has an auxiliary limit value, which when exceeded in a defined manner by the queried number of failed integrity tests performed on the identified filter element (24), causes a warning message to be sent to a predetermined monitoring unit (20) and the resulting blocking of the selected integrity testing device (14b) is maintained until a release message is received from the predetermined monitoring unit (20).