tokens: Thickness shall be measured to verify that it is in accordance with process requirements . NOTE 1 Additional acceptance tests can be specified in order to evaluate the finish of the work - piece or test piece : 1 . vibration;2 . radiation;3 . cleaning;4 . outgassing;5 . humidity;6 . thermal shock;7 . salt spray;8 . electrical resistivity . NOTE 2 The tests are preferably performed according to relevant ECSS documents ( see ECSS - E - ST-10 - 03 ) .