This part of IEC 68 gives a method of test which provides a standard procedure to determine the ability of components@ equipment and other articles@ hereinafter referred to as specimens@ to withstand specified severities of sinusoidal vibration.The purpose of this test is to determine any mechanical weakness and/or degradation in the specified performance of specimens and to use this information@ in conjunction with the relevant specification@ to decide the acceptability of the specimens. In some cases@ the test method may also be used to demonstrate the mechanical robustness of specimens and/or to study their dynamic behaviour. Categorization of components can also be made on the basis of a selection from within the severities quoted in the test.