This International Standard specifies the requirements for testing items of equipment intendedfor use on railway vehicles which are subsequently subjected to vibrations and shock owing tothe nature of railway operational environment. To gain assurance that the quality of theequipment is acceptable, it has to withstand tests of reasonable duration that simulate theservice conditions seen throughout its expected life.Simulated long-life testing can be achieved in a number of ways each having their associatedadvantages and disadvantages, the following being the most common:a) amplification: where the amplitudes are increased and the time base decreased;b) time